Vendor: Alcatel-Lucent. Exam Code: 4A Exam Name: Alcatel-Lucent Interior Routing Protocols and High Availability.

Transcription

1 Vendor: Alcatel-Lucent Exam Code: 4A0-101 Exam Name: Alcatel-Lucent Interior Routing Protocols and High Availability Version: Demo

2 QUESTION 1 When a router receives an IP packet, but does not find a match in the routing table for the destination IP address, what actions are performed by the router? A. The packet is flooded out all router interfaces. B. The packet is dropped and an ICMP unreachable message is sent back to the source. C. The packet is silently discarded. D. The packet is flooded out all interfaces and an ICMP unreachable message is sent. QUESTION 2 Which of the following statements regarding distance vectors protocols are true? (Choose two answers). A. RIPv1, RIPv2, and BGP are distance vector protocols. B. OSPF and IS-IS are distance vector protocols. C. Routing tables are exchanged between neighbors; however, no routing table is transmitted beyond the immediate neighbor. D. Distance vector protocols use the Dijkstra SPF algorithm. E. Routers that participate in distance vector routing protocols maintain full knowledge of distant routers and how they interconnect Correct Answer: AC QUESTION 3 Click the exhibit button.

3 Routers R1,, R2, and R3 are running a classful routing protocol between them. Assuming that router R1 advertises all directly connected networks, how will these networks be represented in router R3's routing table? A. Router R3's routing table can only contain one of the routes, which will result in route flapping. B. Router R3's routing table will have one entry for /24 and one entry for /24. C. The networks will be represented with one entry of /8 in router R3's routing table. D. The networks will be represented with one entry of /24 in router R3's route table. QUESTION 4 In an IP datagram, which of the following fields identifies the receiving application? A. The protocol field of the transport layer header. B. The port field of the transport layer header. C. The protocol field of the network layer header. D. The port field of the network layer address. QUESTION 5 Static routing will be used in a network between a corporate head office, with many connected networks, and a branch office, with one connection to the head office. Which of the following best describes the likely configuration? A. The corporate head office router will have a default route and the branch site will have a more specific static route. B. The corporate head office router and the branch office router will both have specific static routes. C. The corporate head office router and the branch router will both have default routes. D. The corporate head office router will have a more specific static route and the branch office router will have a default route. QUESTION 6 Click the exhibit button. What is the command to configure a static route on the Alcatel-Lucent 7750 SR router R1 to reach the network behind router R2? A. configure router static-route /24 next-hop B. configure router static-route /24 next-hop

4 C. configure router static-route /24 next-hop D. configure router static-route /24 next-hop Correct Answer: A QUESTION 7 There is an IP host with IP address A static route is created, using the "configure router staticroute /24 next-hop " command. What is the correct traceroute command to test this static route on an Alcatel-Lucent 7750 SR? A. traceroute B. traceroute next-hop C. traceroute next-hop D. traceroute does not work on the Alcatel-Lucent 7750 SR. E. traceroute Correct Answer: A QUESTION 8 Click the exhibit button. A static route is created on router R1 "using the "static-route /0 next-hop " command. What command can be used to test the static route on an Alcatel-Lucent 7750 SR? A. ping static B. ping static /0 C. ping D. ping QUESTION 9

5 What is the default preference value for a static route in the Alcatel-Lucent 7750 SR? A. 0 B. 5 C. 10 D. 15 QUESTION 10 Which of the following statements apply to link state protocol behavior? Choose three answers. A. Routers broadcast the entire route table to all neighbors. B. Information about directly connected links is sent to all neighbors. C. An adjacency database is maintained by each router. D. The sequence number for an update is incremented as it is flooded from router to router. E. The topological database is the same for all routers in a single area. CE QUESTION 11 Click the exhibit button. What triggers convergence of the routing protocol when the link between switch 1 and switch 2 goes down? A. Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hello timeouts. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged. B. Convergence is triggered when the physical interfaces between routers R1 and R2 go down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

6 C. Convergence will not be triggered because switches cannot run routing protocols between them. D. Convergence is triggered when the switches notify the routers about the link state information. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged E. Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged. Correct Answer: A QUESTION 12 What are the default Hello and Dead timer intervals for OSPF on the Alcatel-Lucent 7750 SR? A. 5 and 15 seconds B. 10 and 30 seconds C. 5 and 20 seconds D. 10 and 40 seconds QUESTION 13 What causes an adjacency to change from down to two ways? A. When a link state update is received in response to a link state request. B. When a router receives a Hello packet that contains its own router ID in the neighbor list from a neighbor. C. When a router receives a database description packet from a neighbor. D. When a link state acknowledgement is received in response to a link state update. QUESTION 14 Click the exhibit button.

7 In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming that there are no stub networks, which of the following statements regarding type 4 LSA generation is true? A. Router R1 generates a type 4 LSA that is flooded to areas 0, 1, and 2. B. Router R3 generates a type 4 LSA that is flooded to areas 0, 1, and 2. C. Router R3 generates a type 4 LSA that is flooded to areas 0 and 2. D. Router R3 generates a type 4 LSA that is flooded to area 0, and router R6 generates a type 4 LSA that is flooded to area 2. QUESTION 15 Which of the following commands can be used to display the number of SPF computations that have been performed on a router? A. show router ospf area <area-id> B. show router ospf neighbor C. show router ospf interface D. show router ospf status Correct Answer: A QUESTION 16 Which of the following statements describe the major features of OSPF? Choose two answers. A. Fast reroute capability B. Control traffic prioritization C. Route redistribution D. Traffic engineering extensions E. Cut through forwarding D QUESTION 17 Click the exhibit button. What can you deduce from the show command on router R6?

8 A. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment. The DR for this segment would be the router with router ID B. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment; however, this command does not indicate whether or is the DR or BDR. C. The router R6 interface is in a multi-access segment. It is the BDR, which is why it is not adjacent to the other routers. D. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment. The DR for this segment would be the router with router ID QUESTION 18 Click the exhibit button. In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. How many type 4 LSAs will be present in the network? A. One. B. One for each of the routers in area 0 C. One for each of the external routes exported by router R1. D. Type 4 LSAs are not generated in this network topology. QUESTION 19 Which of the following conditions will prevent an OSPF adjacency from reaching the full state? Choose three answers. A. MTU mismatch B. Incorrect subnet mask C. System interface not included in OSPF D. Area ID not the same E. Different metric set on each end of the link F. Router ID not defined Correct Answer: ABD QUESTION 20 Click the exhibit button.

9 The following command sequence is executed on router R2: A: R2# configure router ospf router-id A: R2# configure router router-id On router R1, what router ID appears for router R2 directly after these commands are executed? A B C D QUESTION 21 In an OSPF Hello packet, which of the following fields must match for all neighbor routers on the segment? Choose three answers. A. Area ID W B. B. Hello and Dead intervals PC. C. Stub flag D. Checksum values E. The list of neighbors Correct Answer: ABC QUESTION 22 Click the exhibit button.

10 The OSPF adjacency between routers R3 and R1 is down. What is the problem? A. Area 1 of router R1 should not be configured as a stub. B. Router R3 has the incorrect authentication key type. C. Router R1 has the incorrect authentication key type. D. There is not enough information to tell.

11 QUESTION 23 Click the exhibit button. Given the topology and the show commands, and assuming that router R2 advertises all of its loopbacks into OSPF, what is the correct router R1 configuration?

12 A. Option A B. Option B C. Option C D. Option D Correct Answer: A QUESTION 24 In which of the following types of areas does an OSPF router not set the E bit in its Type 1 LSA? A. Not so stubby area B. Stub area C. Backbone area D. Normal area QUESTION 25 Click the exhibit button.

13 In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Which of the following statements regarding the OSPF LSAs in the network is true? A. Router R1 generates a type 5 LSA that is flooded through all OSPF areas. B. Router R1 generates a type 7 LSA that is flooded through all OSPF areas. C. Router R1 generates a type 5 LSA that is flooded through area 1. Router R2 generates a type 7 LSA that is flooded through areas 0 and 2. D. Router R1 generates a type 7 LSA that is flooded through area 1. Router R3 generates a type 5 LSA that is flooded through areas 0 and 2. QUESTION 26 What is the protocol number for OSPF in the IP header? A. OSPF uses TCP, so the protocol number is 6. B. OSPF uses UDP, so the protocol number is 17. C. OSPF does not use IP. D. OSPF has its own protocol number of 89. QUESTION 27 Click the exhibit button.

14 Which of the following would correctly configure routers R2, R3, and R4?

15 A. Option A B. Option B C. Option C D. Option D QUESTION 28 When are virtual links used in OSPF? A. When two areas need to communicate and there is no area 0. B. When an area needs to traverse another area to reach area 0. C. When two areas are connected to area 0, but there is no direct path between them. D. When an area needs to connect directly to another area without using area 0. QUESTION 29 Which of the following statements regarding area border routers in an OSPF network is true? A. The term backbone router has the same definition as the term area border router. B. An OSPF network needs at least one area border router to function. C. Area border routers connect the backbone area to other areas in an OSPF network.

16 D. By definition, an area border router must perform route summarization between areas. QUESTION 30 Which of the following correctly lists the 5 OSPF packet types? A. Hello, link state update, link state packet, link State acknowledgement, database description. B. Link state update, link state refresh, link state acknowledgement, database description, notification. C. Hello, link state refresh, link state update, link state acknowledgement, link state authentication. D. Hello, link state update, link state request, link state acknowledgement, database description. QUESTION 31 Which of the following OSPF area types are supported by the Alcatel- Lucent 7750 SR? Choose two answers. A. Not so stubby areas B. Level1 area WC C. Stub areas D. Partially stubby areas E. Level 2 areas Correct Answer: AC QUESTION 32 If OSPF is used in a multi-area OSPF network, which of the following statements regarding route summarization is true? A. Manual route summarization can only be done on autonomous system border routers. B. Manual route summarization must be done on all the backbone routers to be effective. Manual route summarization is optional on the routers in non-backbone areas. C. Manual route summarization is done on the ABRs. By default, automatic summarization is done; however, it may not be optimal for all networks. D. Manual route summarization is done on the ABRs. By default, no route summarization is done and all routes are advertised to all areas. QUESTION 33 Click the exhibit button.

17 The OSPF packets shown have been exchanged between two neighbors. What state is the OSPF adjacency in? A. The adjacency state is two way because both routers have received a database description packet. B. The adjacency is in the exchange state. The next step is to exchange link state request and link state update packets. C. The adjacency is in the ex start state. The routers have exchanged database description packets, but still have to negotiate the starting sequence number. D. The adjacency state is full. The routers are exchanging database description packets to notify each other that all link state advertisements have been received. QUESTION 34 Which of the following best describes the type of packets used by OSPF routers to exchange updates on a point-to-point link? A. IP packets sent to an IP multicast address. B. TCP packets sent to an IP multicast address. C. IP packets sent to an IP unicast address. D. UDP packets sent to an IP multicast address. Correct Answer: A QUESTION 35 Which of the following statements best describes an OSPF type 3 LSA? A. An OSPF type 3 LSA is an intra-area LSA, generated by the ABR only when route summarization is configured. B. An OSPF type 3 LSA is an inter-area LSA, generated by the ABR only when route summarization is configured. C. An OSPF type 3 LSA is an inter-area LSA, generated by an ASBR to describe external routes. D. An OSPF type 3 LSA is an inter-area LSA, generated by the ABR to describe a route to neighbors outside the area. QUESTION 36

18 Which of the following types of networks are supported on an Alcatel-Lucent 7750 SR for OSPF? Choose two answers. A. Broadcast B. Non-broadcast multi-access C. Point-to-point D. Point-to-multipoint Correct Answer: AC QUESTION 37 If routers R1 and R2 have a Level 1 and Level 2 IS-IS adjacency, which of the following statements is true? Choose two answers. A. Routers R1 and R2 are in different areas. B. Routers R1 and R2 are in the same area. C. Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is point-to-point. D. Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is broadcast. E. Routers R1 and R2 will send a Level 1/2 Hello PDU if the interface type between them is broadcast. D QUESTION 38 Which of the following is an optional parameter when configuring IS-IS protocol on a router? A. Configure IS-IS interfaces B. Enable IS-IS C. Configure level capabilities D. Specify an area address QUESTION 39 Which of the following features are supported by IS-IS? Choose three answers. A. PDU authentication. B. The ability to customize the link cost metric. C. Use of Bellman-Ford routing algorithm. D. Classless routing. E. Updates sent as layer 3 multicast. Correct Answer: ABD QUESTION 40 Which of the following statements regarding IS-IS LSPs is true? A. There are three types of LSPs: L1, L2 and L1/L2. B. An LSP packet contains the ATT bits and the IS-type bits. C. The lower the LSP sequence number, the more current the update. D. Separate databases are maintained for L1,, L2, and L1/L2 LSPs. QUESTION 41 Which of the following statements regarding the IS-IS CSNP is false?

19 A. CSNPs are used to maintain consistency in the link state database. B. CSNPs are advertised before an adjacency is formed with another router. C. There are two types of CSNPs: Level 1 and Level 2. D. CSNPs are advertised after an adjacency is formed with another router. QUESTION 42 Click the exhibit button. In the IS-IS network shown, router R1 has been configured to summarize network /24 and /24 as /16. Which router's routing table will be reduced compared to the routing table before the summarization? A. Router R1 B. Router R2 C. Routers R1 and R2 D. Router R4 QUESTION 43 What value should the AFI be set to for locally administered addressing? A. 1 B. 49 C. 47 D. 45 E. 39 QUESTION 44 Click the exhibit button.

20 For the IS-IS network shown, and assuming point-to-point links, what adjacencies will router R1 establish? A. L1/L2 adjacency with router R2. L1 adjacency with router R3 B. L2 adjacency with router R2 L1 adjacency with router R3 C. L1/L2 adjacency with router R2 L1/L2 adjacency with router R3 D. L1/L2 adjacency with router R2. L1 adjacency with router R4 L1 adjacency with router R3 QUESTION 45 Which of the following are similarities between OSPF and IS-IS? Choose two answers. A. Metric is based on hop count. B. Slow convergence after link failures. C. Support hierarchy through the use of areas. D. Support for CIDR. E. Link state updates sent using layer 3 multicast. D QUESTION 46 Which of the following statements regarding IS-IS Hello packets are true? Choose two answers. A. Different types of Hello packets are exchanged on point-to-point networks than on broadcast networks. B. L1/L2 Hello packets are exchanged on broadcast links.

21 C. Different L1 and L2 Hello packets are exchanged on broadcast links. D. By default, Hello packets are sent every 5 seconds, and the timeout to declare a neighbor down is 15 seconds. Correct Answer: AC QUESTION 47 Which of the following types of network topologies are supported by IS-IS on the Alcatel-Lucent 7750 SR? Choose two answers. A. Non-broadcast B. Broadcast C. Point-to-multipoint D. Point-to-point D QUESTION 48 Click the exhibit button. What is the state of adjacency? A. Initializing B. Up C. Down D. 2-Way

22 QUESTION 49 At what point is the LSP SRM flag cleared when an LSP is sent on an IS-IS point-to-point link? Choose two answers. A. As soon as the LSP is transmitted. B. When an acknowledgment is received in the form of PSNP. C. When an older LSP is received. D. When a newer or same aged LSP is received. E. Only when a newer LSP is received D QUESTION 50 Click the exhibit button. Given the diagram below, what path will traffic follow from router R6 to router R3, and from router R3 to router R6, if IS-IS is the routing protocol? The numbers beside the links are the metrics for that link. A. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R2-R5-R6). B. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R4-R2-R5- R6). C. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R4-R7-R5- R6). D. Router R6 to router R3 will follow (R6-R5-R7-R4-R3). Router R3 to router R6 will follow (R3-R4-R7-R5- R6). QUESTION 51 When IS-IS elects a DIS, what is used as the tie breaker on an Alcatel-Lucent 7750 SR, if the priorities are the same? A. The system ID.

23 B. The loopback address. C. The sequence number of the Hello packet. D. The device that first initiated communication becomes the DIS E. The highest interface MAC address. Correct Answer: E QUESTION 52 Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. How many adjacencies will be formed between them? A. None B. 1 C. 2 D. 3 E. 4 QUESTION 53 In IS-IS, which of the following statements regarding an L1/L2 router is false? A. An L1/L2 router can have neighbors in different areas. B. An L1/L2 router calculates separate SPF trees for the Level 1 and Level 2 topology. C. An L1/L2 router advertises its L2 routes to its L1 neighbors. D. An L1/L2 router sets the ATT bit in L1 LSPs to identify itself as an L1 router. QUESTION 54 How are IS-IS LSPs sent on point-to-point links? A. They are sent using multicast MAC addresses 0180:0200:0014. B. They are sent using multicast MAC addresses 0180:c200:0015. C. They are sent using a unicast address. D. None of the above. QUESTION 55 Given the NSAP address of , what area does the IS-IS router reside in? A B C D E QUESTION 56 Which type of IS-IS router is summarization most likely to be configured on? A. L1 routers B. L2 routers C. L1/L2 routers

24 D. L1 and L2 routers QUESTION 57 Click the exhibit button. Router R2 advertises the network /24 to router R1 via OSPF. A route policy has been constructed to discard the route on router R1; however, it is not working. What is the problem? A. The prefix list reject should be " /16 exact". B. Router R1 should be configured as an OSPF "asbr". C. The policy "reject" should be set for import rather than export. D. The policy was likely not "committed" after creation. E. This is not possible because OSPF cannot use import policies. Correct Answer: E QUESTION 58 Click the exhibit button.

25 If router R2 redistributes the IS-IS route to /24 into OSPF, router R3 preference of these two routes? Choose two answers. A. The OSPF internal preference B. The IS-IS Level 1 internal preference C. The IS-IS Level 2 internal preference D. The OSPF external preference E. The IS-IS Level 2 external preference F. The IS-IS Level 1 external preference D QUESTION 59 An Alcatel-Lucent 7750 SR receives a route via an IS-IS LSP with internal reach ability, and receives the same route via an OSPF type 5 LSA. If al protocol preferences are default, which route will be installed in the route table? A. The route learned via IS-IS will be installed. B. The route learned via the OSPF type 5 LSA will be installed. C. Both routes will be installed, if ECMP is enabled. D. Both routes will be installed, regardless of whether ECMP is enabled. Correct Answer: A QUESTION 60 Which of the following cannot be used as a matching criterion in route policy statements? A. Source IP address B. TCP source port C. Prefix list D. Protocol type QUESTION 61 How many databases does a Link State routing protocol use?

26 A. One B. Two C. Three D. Four QUESTION 62 In an IP datagram, which field identifies the receiving application A. The protocol field of the transport layer header B. The port field of the transport layer header C. The protocol field of the network layer header D. The port field of the network layer address QUESTION 63 A static route is created using the command "static-route /0 next-hop ". What command could be used to test the static route on an Alcatel-Lucent 7750 SR? A. Ping static B. Ping static /0 C. Ping D. Ping QUESTION 64 A static route is created using the command "static-route /24 next-hop ". What is the correct traceroute command to test this static route on an Alcatel-Lucent 7750 SR? A. traceroute B. traceroute /24 next-hop C. traceroute next-hop D. traceroute does not work on the Alcatel-Lucent 7750 SR Correct Answer: A QUESTION 65 Which one of the commands below will create a static route to network /24 on the AlcatelLucent 7750 SR router? A. Static route next hop B. Static-route next-hop /24 C. Static route /24 next hop D. Static-route /24 next-hop QUESTION 66 A default route for a client is also known as the: A. Default path B. Default gateway C. Gateway path D. Proxy ARP

27 QUESTION 67 What is the default preference value for a static route in the Alcatel-Lucent 7750 SR router? A. 0 B. 5 C. 10 D. 15 QUESTION 68 What command could be used to verify proper configuration of a static route in an Alcatel- Lucent 7750 SR router? A. Show route-table B. Show router routing-table C. Show router route-table D. Show static QUESTION 69 What address is used when RIPv2 uses multicast to send its updates? A B C D E. RIPv2 does not have support for multicast QUESTION 70 What is the metric and maximum routable value for RIP? A. Hop count and 16 B. Hop count and 15 C. Link cost and 15 D. Link cost and 16 QUESTION 71 What modes of authentication are supported for RIPv2 on the Alcatel-Lucent 7750 SR? A. RIPv2 supports basic and MD5 authentication only. B. RIPv2 supports password and MD5 authentication only. C. RIPv2 does not support authentication, password and MD5 authentication. D. RIPv2 does not support authentication. QUESTION 72 Which of the following is NOT a characteristic of RIPv1?:

28 A. 30 second network updates B. Classless routing C. Broadcast advertisement D. Poison Reverse QUESTION 73 What is the default inbound metric for RIP on the Alcatel-Lucent 7750 SR? A. Whatever the advertised metric happens to be. B. A value of 1. C. This must be administratively set as there is no default value. D. A value of 15. QUESTION 74 Identify two attributes of Distance Vector Protocols: (Choose two) A. Use split horizon by default. B. Send information about directly connected links to neighbors at periodic intervals. C. Use holddown timers when topologies change to allow for convergence. D. Maintain multiple databases: neighbor, topology and routing. Correct Answer: AC QUESTION 75 Choose the Distance Vector Protocols from the list below: A. OSPF B. RIPv1 C. RIPv2 D. IS-IS C QUESTION 76 What must be configured on the Alcatel-Lucent 7750 SR for RIP to advertise locally attached links? A. A policy statement within the router identifying what is to be advertised B. Access-lists denoting what is to be advertised C. Default metrics for each link D. A group and neighbor statement for each peer Correct Answer: A QUESTION 77 In an OSPF environment, what must a router receive after it sends out an update? A. The router must receive an acknowledgment B. The router must receive a Hello C. The router must receive a new sequence number D. The router must receive a Link State Packet Correct Answer: A

29 QUESTION 78 An OSPF router receives an update in which the sequence number, age, and checksum are the same as the entry already in the topological database. What action is taken by the router? A. The link state information is not populated in the database but is forwarded to all neighbors B. The link state information already in the database is overwritten and the age is reset C. The link state information is not populated in the database and an acknowledgement is sent D. The link state information is regarded as old and nothing is done. QUESTION 79 From the list below select the statements that describe the behavior of link state information aging. (Choose 2) A. The age for newly created link state information is set to 0 for OSPF and 1200 for IS-IS B. The age for newly created link state information is set to 1200 for OSPF and 0 for IS-IS C. The age is incremented or decremented as it is flooded from router to router and as it is held in the topological database. D. The age is incremented or decremented only as it is held in the topological database and not as it is flooded router to router. Correct Answer: AC QUESTION 80 What are the three databases maintained by a Link State Protocol? A. Neighbor, adjacency, route table B. Neighbor, topology, forwarding C. Topology, routing, forwarding D. There are only two databases: adjacency and topology QUESTION 81 Which of the statements below best describes the pseudonode in an IS-IS network? A. The DIS creates a logical node to represent a group of routers on the same non-broadcast network; this node is the pseudonode B. The DIS creates a logical node to represent the topological database of the backbone network in an IS- IS network; this node is the pseudonode C. The DIS creates a logical node to represent a broadcast sub-network; this node is the pseudonode D. The DIS creates a logical node to represent the complete topology of an IS-IS area; this node is the pseudode QUESTION 82 What command will show the IS-IS neighbors, and their status on an Alcatel-Lucent 7750 SR? A. Show isis neighbors B. Show router isis neighbors C. Show router isis adjacency D. Show isis adjacency QUESTION 83

30 What are the types of routers in an IS-IS topology? Choose all that apply. A. Level 0 B. Level 1 C. Level 2 D. Level 0/1 E. Level 1/2 CE QUESTION 84 What command allows analysis of the Dijkstra calculation on the Alcatel-Lucent 7750 SR? A. There is no such calculation in IS-IS B. Show router isis database C. Show router isis dijykstra D. Show router isis spf QUESTION 85 What is the term used for the updates sent by IS-IS? A. Link State PDUs B. Link State Updates C. Link State Advertisements D. Intermediate System Update Packets Correct Answer: A QUESTION 86 What is the value of the protocol discriminator used to denote IS-IS protocol information? A. 89 B. 87 C. 85 D. 83 QUESTION 87 What types of routers can an IS-IS L1 router form adjacencies with? Pick all that apply. A. L1 routers in the same area B. L1 routers in other areas C. L2 routers in the same area D. L2 routers in other areas E. L1/L2 router in the same area F. L1/L2 routers in other areas Correct Answer: AE QUESTION 88 What value should the AFI be set to for locally administered addressing? A. 1 B. 49

31 C. 83 D. 0 QUESTION 89 What are the similarities between OSPF and IS-IS? Choose two. A. Metric is cost based B. Slow convergence C. Automatic summarization D. Support CIDR Correct Answer: AD QUESTION 90 Exhibit The following IS-IS packets have been exchanged between 2 adjacent IS-IS routers. What type of adjacency will be formed? A. An L1 adjacency will be formed. B. An L1/L2 adjacency will formed C. L2 adjacency will be formed D. No adjacency will be formed QUESTION 91 Which of the following best describes how IS-IS routers exchange updates on an Ethernet interface? A. IS-IS routers exchange updates by sending UDP packets to a multicast address.

32 B. IS-IS routers exchange updates using IP multicast packets. C. IS-IS routers exchange updates using Ethernet multicast packets. D. IS-IS routers exchange updates by sending packets to the subnet broadcast address. QUESTION 92 What acts as the tie breaker on an Alcatel-Lucent 7750 SR if the priorities are the same when IS- IS is electing a DIS? A. The system ID B. The loopback address C. The sequence number of the hello packet D. The device that first initiated communication becomes the DIS Correct Answer: A QUESTION 93 How many bytes make up the system ID in an IS-IS NSAP address on the Alcatel-Lucent 7750 SR? A. 4 bytes B. 6 bytes C. 8 bytes D. Variably between 4 and 8 bytes QUESTION 94 In an OSPF Hello packet what fields must match all neighbor routers on the segment? (Choose 3) A. Area ID B. Hello and Dead Intervals C. Stub flag D. DR and BDR addresses E. The list of neighbors Correct Answer: ABC QUESTION 95 What type of OSPF router generates a type 2 LSA? A. Area Border Router B. Autonomous System Boundary Router C. Designated Router D. All routers within an OSPF area. QUESTION 96 What is the default priority value used for electing the DR on an Alcatel-Lucent 7750 SR running OSPF on an Ethernet? A. Priority of 0 B. Priority of 1 C. Priority of 64 D. Priority of 255

33 QUESTION 97 Which of the following statements regarding the election of the designated router (DR) by OSPF routers are true? (Choose two) A. The router with the lowest priority is the DR. B. The router with the highest priority is the DR. C. If priorities are the same, the DR is chosen based on the lowest RID. D. If priorities are the same, the DR is chosen based on the highest RID. D QUESTION 98 What are the types of networks supported on an Alcatel-Lucent 7750 SR for OSPF? (Choose 2) A. Broadcast B. Non-Broadcast Multi-Access C. Point-to-Point D. Point-to-Multipoint Correct Answer: AC QUESTION 99 What are the ways the RID can be created on an Alcatel-Lucent 7750 SR router? (Choose three) A. From the last 32 bits of the chassis MAC address B. From the first 32 bits of the chassis MAC address C. The loopback IP address D. By using the command "config router ospf rid X.X.X.X" E. From the system IP address F. From the highest interface IP address Correct Answer: ADE QUESTION 100 Exhibit

34 Given the two configurations shown, identify the two incorrect statements below: (Choose two) A. Both routers will generate OSPF Hello packets. B. The system interface is missing in one configuration so OSPF will not operate correctly. C. The interface type settings differ, but OSPF will still operate correctly. D. Metric values differ, but this does not prevent OSPF operation. C QUESTION 101 If a Router originates a type 1 router LSA with the E bit set what types of areas can it belong to? Select all that apply. A. Not So Stubby Area B. Stub Area C. Backbone Area D. Standard Area Correct Answer: ACD QUESTION 102 Which of the following statements regarding OSPF routing updates on a multi-access network segment is true?

35 A. In multi-access networks, a DR and BDR are elected only if there are more than two routers connected to the network segment. B. In multi-access networks, a DR and BDR are elected only if the subnet masks on the router interfaces are less than /30 C. In multi-access networks, a DR and BDR are elected. To ensure resiliency, both the DR and BDR send link-state advertisements describing the network. D. In multi-access networks, a DR and BDR are elected. The DR sends link-state advertisements describing the network. QUESTION 103 An OSPF ASBR must have at least one interface in the backbone area (area 0) A. True B. False QUESTION 104 The Alcatel-Lucent 7750 SR supports which two of the OSPF area types below? A. Not So Stubby Areas B. Level 1 Areas C. Stub Areas D. Partially Stubby Areas Correct Answer: AC QUESTION 105 What command will show the OSPF neighbors, and their status on the Alcatel-Lucent 7750 SR? A. Show ospf neighbors B. Show router ospf neighbors C. Show router ospf adjacency D. Show ospf adjacency QUESTION 106 Which of the LSA types stay within an OSPF area and are not exported outside of the area? (Choose all that apply) A. Router LSA B. Network LSA C. Summary Network LSA D. Summary Router LSA Correct Answer: AB QUESTION 107 What is the source IP address in an OSPF update? A B C. The unicast IP address of the interface the update is being sent on. D. The system address of the router

36 QUESTION 108 NSSA LSA packets are what type within an NSSA area, and are converted to what other type at the ABR? A. They are type 7 within the area and are not modified at the ABR B. They are type 5 within the area and converted to type 3 at the ABR C. They are type 5 within the area and are not modified at the ABR D. They are type 7 within the area and converted to type 5 at the ABR QUESTION 109 What best describes the type of packets used by OSPF routers to exchange updates on a pointto- point link? A. IP packets sent to an IP multicast address. B. Ethernet frames sent to an Ethernet multicast address. C. IP packets sent to an IP unicast address. D. UDP packets sent to an IP multicast address. Correct Answer: A QUESTION 110 Graceful Restart is supported by what IGPs? A. RIPv1 and RIPv2 B. OSPF C. IS-IS D. BGP C QUESTION 111 What are some of the characteristics of Alcatel-Lucent's implementation of non-stop routing? (Choose two) A. No protocol extensions required B. Only supported by OSPF and IS-IS C. Transparent to routing neighbors D. Uses Graceful Restart to inter-operate with other vendors Correct Answer: AC QUESTION 112 Click the exhibit button.

37 Two neighboring OSPF routers have exchanged the packets shown. What state is the adjacency in? A. Full; both routers are exchanging Helios to maintain the adjacency. B. The adjacency is down. C. The adjacency is in exstart state. D. The adjacency is in the exchange state. QUESTION 113 When an OSPF adjacency is stuck in the "ExchStart" state, what is the most likely cause? A. The MTU does not match on both interfaces B. OSPF is not enabled on one of the routers C. The Router ID is the same on both routers D. A OSPF Hello has not been received from the neighbor Correct Answer: A QUESTION 114 Select the answer below that correctly lists the 5 different OSPF packet types.

38 A. Hello, Link State Update, Link State Packet, Link State Acknowledgement, Database Descriptor B. Link State Update, Link State Refresh, Link State Acknowledgement, Database Descriptor, Notification C. Hello, Link State Refresh, Link State Update, Link State Acknowledgement, Link State Authentication D. Hello, Link State Update, Link State Request, Link State Acknowledgement, Database Descriptor QUESTION 115 What causes an adjacency to change from "Init" to "Two Way"? A. When a Link State Update is received in response to a Link State Request B. When a router receives a Hello packet from a neighbor that contains its router id in the neighbor list C. When OSPF neighbors exchange Database Descriptor packets D. When a Link State Acknowledgement is received in response to a Link State Update QUESTION 116 When redistributing OSPF into RIP V2 what must be taken into consideration for the redistribution to take place? A. The metric must be set accordingly for RIP B. The subnet mask must be removed from the OSPF route C. You must divide the cost of the OSPF route by three D. The router must be configured as an ASBR Correct Answer: A QUESTION 117 What is wrong with the following filter configuration from an Alcatel-Lucent 7750 SR? RTR-B# configure filter RTR-B>config>filter# ip-filter 1 create RTR-B>config>filter>ip-filter$ entry 1 create RTR-B>config>filter>ip-filter>entry$ match src-ip /16 RTR-B>config>filter>ip-filter>entry# action drop RTR-B# configure router interface tortr-a RTR-B>config>router>if# egress RTR-B>config>router>if>egress# filter ip 1 A. There is nothing wrong with this filter B. The filter should be applied to the ingress and not the egress. C. The mask cannot be a "/" value, it must be in dotted decimal. D. All traffic is being blocked QUESTION 118 When configuring a filter, where should the most explicit entries be placed? A. At the bottom B. In the middle C. At the top D. It does not matter where they are placed.

39 QUESTION 119 From the list below identify two matching criteria supported for IP filters on the Alcatel-Lucent 7750 SR: (Choose two) A. DSCP marking B. Class of Service Marking C. DSAP marking D. ICMP type Correct Answer: AD QUESTION 120 What command is used on the Alcatel-Lucent 7750 SR to define the default action to be taken if a packet does not match any entry in an IP filter? A. config>filter# default-action XXX B. config>filter>ip-filter# default-action XXX C. config>filter# default-mode XXX D. config>filter>ip-filter# default-mode XXX QUESTION 121 What is another term to describe the default route for a client? A. Black hole B. Default gateway C. Gateway path D. Proxy ARP QUESTION 122 Which of the following is not one of the MT topologies defined for IS-IS? A. IPv4 In-Band Management B. IPv6 Routing C. IPv4 Multicast Routing D. IPv6 Multicast Routing E. All of the above are MT topologies defined for IS-IS. Correct Answer: E QUESTION 123 Click the exhibit button

40 The /24 network is learned on router R1 via IS-IS Given the OSPF configuration shown, and assuming that the OSPF adjacency between routers R1 and R3 is up, why is the /24 route not in router R3's route table? (Choose two) A. The route policy should be applied as in import policy B. The no-redistribute-external command is used on router R1 C. The route policy is incorrect. It should say "from protocol ISIS" rather than "from protocol direct". D. It is not possible to be an ASBR and an NSSA. The ASBR configuration should be removed. E. The interface between routers R1 and R3 needs to be in OSPF area 0 rather than OSPF area 1 because a backbone area must always exist. C QUESTION 124 Which of the following best describes the actions after an IS-IS router receives on a broadcast interface, a newer LSP than the one in its database? A. The router sends a copy of the LSP from its database to its neighbor B. The router updates its database with the LSP and floods a copy to its other neighbors. C. The router updates its database with the LSP, acknowledges the LSP with a PSNP and floods a copy to its other neighbors. D. The router updates its database with the LSP and acknowledges it with a PSNP.

41 QUESTION 125 Refer to the exhibit. Assume that OSPFv3 is properly configured on all routers and that R4 advertises its system prefix into Area 0. Which of the following statements best describes how R5 learns R4's IPv6 system prefix? A. With a Router LSA originated by R1 B. With a Router LSA originated by R5 C. With a Router LSA originated by R4 D. With an Inter-Area Prefix LSA originated by R1 E. With an Inter-Area Prefix LSA originated by R5 F. With an Inter-Area Prefix LSA originated by R4 QUESTION 126 Click the exhibit button.

42 is a loopback interface on router R2 and is distributed to OSPF area 0, but the ping fails from router R3. Which of the following is a possible solution to the problem? A. Add the "originate-default-route" option in the NSSA area configuration on router R3 B. Add the "summaries" option to the NSSA area configuration on router R1 C. Make a static route on router R1 to D. Make a default route on router R2 QUESTION 127 Which of the statements about the output in the exhibit is FALSE?

43 A. The system interface is configured with IPv6 address 2001DB8 1:100:1/128 B. All interfaces are configured for IPv4 and IPv6. C. Interface "tor2" is configured with a globally routed IPv6 address. D. Interface "tor3" is not configured for IPv6 with a global IPv6 address. QUESTION 128 Click the exhibit button.

44 Given the diagram in the exhibit, what would be the correct static route configuration on the router on the right, if it is an Alcatel-Lucent 7750 SR? A. config> static-route /0 next-hop B. config>router> static-route next-hop C. config>router> static-route /0 next-hop D. config>router> static-route /0 next-hop QUESTION 129 Which of the following statements regarding link state protocols are true? (Choose two) A. When a router receives updates from its neighbors, it adds them to its link state database, performs an SPF computation, and sends the results to its neighbors. B. An SPF computation is done by each router to determine the best path to destination networks. All the best paths determined by the SPF calculation will be seen in the route table. C. Each router constructs its own link state database with updates received from neighbors. D. An SPF computation is done by each router to determine the best path to destination networks. All the best paths determined by the SPF calculation will be offered to the route table manager. D QUESTION 130 Which of the following OSPFv3 LSAs have an AS scope? A. Link Local LSA B. Router LSA C. Network LSA D. Inter-Area Router LSA E. Intra-Area Prefix LSA F. None of the above LSAs have an AS scope. Correct Answer: F QUESTION 131 An operator configures an Alcatel-Lucent 7750 SR with a loopback interface and IPv6 address. The operator then configures a routing policy to redistribute the loopback prefix into OSPFv3. What type of LSA is used to advertise the route to other OSPFv3 routers in the same area? A. Router LSA B. AS External LSA C. Intra-Area Prefix LSA D. Inter-Area Prefix LSA E. Network LSA F. None of the statements are correct. QUESTION 132 Click the exhibit button. Which of the following statements best describes the format of data traffic sent from the PC to the server? A. The source IP address will be the address of the PC, and the destination IP address will be the system IP address of router R1; the source MAC address will be the MAC address of the PC, and the destination MAC address will be the MAC address of the router R1 port connected to the PC. B. The source IP address will be the address of the PC, and the destination IP address will be the IP

45 address of the router R1 port connected to the PC, the source MAC address will be the MAC address of the PC, and the destination MAC address will be the MAC address of the router R1 port connected to the PC. C. The source IP address will be the address of the PC, and the destination IP address will be the IP address of the server, the source MAC address will be the MAC address of the PC, and the destination MAC address will be the MAC address of the server. D. The source IP address will be the address of the PC, and the destination IP address will be the IP address of the server; the source MAC address will be the MAC address of the PC, and the destination MAC address will be the MAC address of the router R1 port connected to the PC. QUESTION 133 If two routers running IS-IS protocols are exchanging Hello packets with different authentication types, which of the following statements regarding the adjacency state established between them is true? A. Different authentication types are not possible because IS-IS only supports password authentication. B. An adjacency will not be formed C. The two routers negotiate the authentication type and then reach the up state. D. Only an L2 adjacency will form, as long as both routers are L2 capable. QUESTION 134 Which of the following is optional when configuring IS-IS on the Alcatel-Lucent 7750 SR? A. Configuring IS-IS interfaces B. Enabling IS-IS C. Configuring level capabilities D. Specifying an area address QUESTION 135 Which of the following TLV fields is included in an IS-IS Hello packet? A. Area addresses TLV Intermediate system neighbors TLV Authentication information TLV B. Intermediate system neighbors TLV Area addresses TLV LSP entries TLV C. The IP internal reachability information TLV Area Addresses TLV Authentication Information TLV D. The IP external reachability information TLV Area addresses TLV Intermediate system neighbors TLV Correct Answer: A QUESTION 136 What is the CIDR summary for the block of networks from /24 to /24? A /20 B /21 C /21 D /20

46 Correct Answer: A QUESTION 137 The exhibit shows a route to 2001:DB8:1:200::/56 in the IPv6 route table. How did the route get into the route table? A. Configure router ipv6 static-route 2001:DB8:1:200::/56 next-hop FE80::225:BAFF:FE30:94E3 B. Configure router ipv6 static-route 2001:DB8:1:200::/56 next-hop FE80::225:BAFF:FE30:94E3-toR2 C. Configure router static-route 2001:DB8:1:200::/56 next-hop FE80::225:BAFF:FE30:94E3 D. Configure router static-route 2001:DB8:1:200::/56 next-hop FE80::225:BAFF:FE30:94E3- tor2 E. The route was learned through a dynamic routing protocol. QUESTION 138 Click the exhibit button.

47 A static route has been configured on router R1 to reach the PC at However, as shown in the exhibit, the ping fails. What is the most likely cause of the problem? A. Router R2 does not have a route to the system address of router R1 and therefore cannot respond to the ping. B. There is no default route configured on the PC. C. Router R2 does not have a route configured to the PC. D. Router R1 needs to be configured with a default route. QUESTION 139 Which of the statements below best describes the operation of the IPv6 anycast address? A. A packet with a destination anycast address is sent to all nodes on the local link. B. A packet with a destination anycast address is sent to all nodes on the local network. C. A packet with a destination anycast address is sent to all nodes that have joined the anycast group.

48 D. A packet with a destination anycast address is sent to the nearest node that is assigned the anycast address E. A packet with a destination anycast address is sent to all nodes that are assigned the anycast address. QUESTION 140 Refer to the exhibit below. R1 distributes its loopbacks into IS-IS and globally routed addresses are configured as shown. How many routes will R4 have in its IPv6 route table? A. 1 B. 2 C. 3 D. 4 E. 6 F. 7 QUESTION 141 Which three IS-IS PDU types are used for database synchronization? A. Hellos, CSNPs, PSNPs B. LSPs. Hellos, CSNPs C. LSPs, PSNPs, Hellos D. LSPs, CSNPs, PSNPs QUESTION 142 Which of the following statements regarding IS-IS DIS is false? A. L1 and L2 routers elect separate DIS's. B. DIS uses multicast address 0180x200:0015 to communicate with other routers on the broadcast network. C. If a new router starts up in a LAN and has a higher interface priority, the new router preempts the original DIS and becomes the DIS. D. In broadcast multi-access networks, such as Ethernet, a single router is elected as the DIS. There is no backup DIS

49 QUESTION 143 Which of the following describes the method used to resolve an IPv6 address to a MAC address? A. IPv6 uses the Address Resolution Protocol to resolve the address to a MAC address. B. A Neighbor Discovery message is sent to the broadcast MAC address. The host with the IPv6 address responds with a Neighbor Advertisement message. C. A Neighbor Discovery message is sent to the solicited-node multicast address. The host with the IPv6 address responds with a Neighbor Advertisement message. D. A Neighbor Discovery message is sent to the anycast address for the LAN. The host with the IPv6 address responds with a Neighbor Advertisement message. E. IPv6 addresses do not need to be resolved to a MAC address. QUESTION 144 A router sets the E bit in the flags of its Type 1 LSA. What does this indicate? A. The router is an ABR. B. The router is an ASBR. C. The router is at the end of a virtual link. D. The router's interface is in a stub area. QUESTION 145 Click the exhibit button. Router 2 advertises the network /24 to router R1 via IS-IS. How can router R1 ensure that it discards the route? A. Use a prefix list on router R1 to discard all ingress IS-IS routes. B. Use an export policy and prefix list on router R1. C. Use an import policy and a prefix list on router R1. D. This is not possible because IS-IS cannot use import policies. QUESTION 146 In IS-IS database synchronization, each router compares each LSP described in the received CSNPs with the LSPs in its own database. Which of the following actions is taken if the database contains a newer copy of the LSP? A. The router sends a copy of the LSP from its database to its neighbor B. The router sends a PSNP to its neighbor describing the LSP in its database. C. The router updates its database with the LSP and floods a copy to its other neighbors. D. The router sends a PSNP to its neighbor to request the LSP. Correct Answer: A

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