debug ip ospf database external default-metric subnet area 0 stub distribute-list in Serial0/1

Transcription

1 Which statement about stateless autoconfiguration is true? A host can autoconfigure itself by appending its MAC address to the local link prefix (64 bits). 2 Autoconfiguration allows devices to connect themselves to the network using IOS router DHCP services. Autoconfiguration is well suited for devices such as servers and print servers. During the autoconfiguration process, a router advertises the IPv6 64-bit prefix of its interface, and the host prepends this prefix to its EUI-64 formatted MAC address. During the autoconfiguration process, the host sends a router advertisement, and the router replies with a router solicitation. Refer to the exhibit. Two-way redistribution was configured between OSPF and RIP on R2. After the redistribution, R3 does not see any external routes coming from the RIP domain. The debug ip ospf database external output reveals that no external LSAs are generated for the routes. What could the problem be? A default-metric command is missing from the R2 configuration. A subnet keyword is missing from the R2 configuration. An area 0 stub command is missing from the R2 configuration. A distribute-list in Serial0/1 command on R3 is blocking all of the updates coming from R2.

2 3When running OSPF, which options must be the same within the hello packet exchanged between two adjacent routers? (Choose three.) stub flag hello/dead intervals router priority DR/BDR assignments area ID 4 A client computer is set up for DHCP and needs an IP configuration. During the DHCP client configuration process, which response will enable the client to begin using the assigned address immediately? DHCPACK DHCPREQUEST DHCPOFFER DHCPDISCOVER 5. Which EIGRP table contains information regarding the distance reported by an adjacent neighbor to a specific destination? routing table neighbor table adjacency table topology table distance table 6What effect will a passive-interface command have on a specific interface? It will prevent the transmitting of routing protocol information through the interface. It will prevent the sending or receiving of any information on the interface. It will force the router to ignore incoming routing updates. It will prevent routes learned through the interface from being listed in the routing table. 7 Which statement best describes routing of packets to the network as displayed in the graphic of the EIGRP topology table entry? equal-cost load balancing using interface Serial0 and Ethernet1 unequal-cost load balancing using interface Serial0 and Ethernet1

3 8 equal-cost load balancing using interface Serial0 and Ethernet0 no load balancing on interface Serial0 and Ethernet1 Observe the graphic and configuration. What must the administrator do to ensure that clients within the /24 network will be able to communicate with clients within the /8 network? configure summarization on R1 with the ip summary-address eigrp command disable automatic summarization on R1 with the no auto-summary command add the network mask command under router eigrp 100 enable classless support on R1 with the ip classless command nothing, EIGRP supports discontiguous subnets by default 9. A network administrator has recently added a new area, Area 3, to the OSPF internetwork. Due to physical limitations, it is not possible to provide Area 3 with direct access to the backbone. What must the administrator

4 configure to ensure continuity in the OSPF network? area area-id stub no-summary neighbor area area-id nssa no-summary area area-id virtual-link router-id 10 In which state does BGP start exchanging update packets with its peers? connect established update active Refer to the exhibit. Host A is unable to obtain an IP address from the DHCP server. Which procedure would solve this problem? Configure ip helper-address on interface Fa0/0 of router RTA. Configure ip helper-address on interface Fa0/0 of router RTA. Configure ip helper-address on interface Fa0/1 of router RTA. Configure ip forward-protocol 67 on interface Fa0/0 of router RTA. Configure ip forward-protocol 68 on interface Fa0/1 of router RTA. Configure ip forward-protocol 67 on interface Fa0/1 of router RTA. 12. When a router receives updates from different routing protocols regarding the same network, what is the determining factor for choosing the best route? hop count routing metric

5 topological database administrative distance 13 Refer to the exhibit. Router-A and Router-B are not forming an EIGRP neighbor relationship. What is the reason? AS number mismatch incorrect route redistribution K-values mismatch stuck-in-active 14 A network administrator recently redistributed RIP routes into the OSPF network and would like to reduce the size of the routing table. Given the above graphic, which command would create an external summarization of all the RIP routes? summary-address

6 summary-address area 0 range area 0 range area 1 range Which three statements about the similarities between OSPFv2 and OSPFv3 are true? (Choose three.) LSA flooding and aging are the same. Neighbor discovery and adjacency formation are the same. Hello, DBD, LSR, LSU packet types are similar. Multicast addresses are the same. Authentication between OSPF enabled routers uses the same protocols. The router ID in OSPFv3 is also expressed in the same 16-bit format as OSPFv2. 16 Given the following configuration, which statement is true? access-list 1 permit access-list 2 permit route-map ISP1 permit 10 match ip address 1 set interface serial 0/0 router-map ISP2 permit 20 match ip address 2 set ip next-hop Access-list 1 specifies packets with a destination address of will be policy-routed. Access-list 2 specifies packets with a source address of will be policy-routed. Packets that match access-list 1 will be sent to the next-hop address Packets that match access-list 2 will be denied access. Both match statements must be true for route-map ISP1 to be true. 17

7 Given the above graphic, which command will perform interarea route summarization? RTA(config-router)# summary-address RTB(config-router)# summary-address RTB(config-router)# area 1 range RTA(config-router)# area 1 range Which of the following is a network service that is used to reduce the task of allocating IP addresses? DHCP PAT NAT DNS 19 Which technique effectively insulates other routers from the problem of route flapping? route summarization network address translation IPv6 helper addresses 20 An IS-IS Level 1 and Level 2 (L1L2) router has the characteristics of which OSPF router? backbone router non-backbone router

8 ABR ASBR Refer to the exhibit. Which statement is correct about EIGRP authentication? Because the MD5 password does not match, Router A and Router B will not exchange EIGRP routing tables. Because the time period for which the key can be sent for key 1 does not match, Router A and Router B will not exchange EIGRP routing tables. Because a key chain is not associated with the interface, Router A and Router B will not exchange EIGRP routing tables. Router A and Router B will authenticate and exchange EIGRP routing tables. 22 What is the purpose of using Internet Group Management Protocol (IGMP) in an IP multicast network? IGMP is used to dynamically register individual hosts in a multicast group on a particular LAN.

9 IGMP is used to deliver the IP Multicast traffic only to those switch ports that are interested in the traffic. IGMP uses the existing unicast routing table to determine the upstream and downstream multicast neighbors. IGMP uses the unicast routing information to perform the multicast forwarding function. 23 When would a network administrator choose to implement multiple NETs on a router configured to use the IS-IS protocol? when splitting, merging, or renumbering areas during transitions when configuring IS-IS to route both CLNS and IP when creating multiple Layer 2 broadcast domains in the IS-IS environment when segregating the CLNS traffic from IP traffic 24 Given the above output from the show ip route command on RTA, which two statements are true? (Choose two.) This route has an administrative distance of 1 by default. This route has an administrative distance of 5 by default. This route has an administrative distance of 90 by default. RTA is configured with route redistribution and the /16 network was redistributed from another routing protocol. RTA is configured with manual summarization of the /16 network on an interface. RTA is configured with a static route sending all traffic destined for the /16 network to the null0 interface. 25

10 Refer to the configurations shown in the graphic. R1 and R2 are unable to establish a BGP peer relationship. After a network administrator has confirmed that each router can ping the loopback interface of the other router, what can be done to fix this problem? add a BGP network command for /24 on both routers add the BGP no synchronization command on both routers add the BGP neighbor update-source serial0 command on both routers add the BGP neighbor ebgp-multihop 255 command on both routers Given the above configuration, what is the purpose of the keyword summary-only? advertises /8 and the more-specific route, /16 advertises the supernet route only; all of the more-specific routes are suppressed advertises the /8 route and any more-specific routes including AS set path information advertises all of the more-specific routes

11 27 Of the five EIGRP parameters, bandwidth, delay, reliability, load, and MTU, which are used by default in determining the best path? bandwidth, delay, reliability bandwidth, load, reliability bandwidth, reliability, delay bandwidth, delay bandwidth, load 28 If an organization has a registered Autonomous System number of 60374, what would be the corresponding Multicast GLOP address? By default, if an IGP has not learned about a local route, BGP cannot advertise it. Which configuration parameter will override this behavior? ebgp-mulithop no synchronization remote-as next-hop-self 30 Refer to the diagram. Which state is RTB in if it sees itself in the RTA hello but no routing information has been exchanged? init state

12 two-way state exstart state exchange state loading state 31 Which statement is true about IPv4 multicast addressing? When a device joins a multicast group, it automatically assigns the multicast address to its interface. The total number of IP multicast addresses is reduced by 32 because of the mapping of IP multicast addresses to Layer 2 addresses. The subnet mask for the multicast address controls the scope of the multicast delivery. A device assigns a subnet mask to the multicast address of Multicast addresses are assigned to virtual interfaces. Multicast addresses have a single group destination. 32 Refer to the exhibit. On the basis of the information that is presented, what additional configuration is required? The ip address dhcp command is required on interface Fa0/0.

13 The ip dhcp information option command is required on interface Fa0/1. The ip forward-protocol 37 command is required on interface Fa0/1 to forward DNS requests to IP address The ip forward-protocol 67 command is required on interface Fa0/1 to forward DHCP requests to IP address The ip forward-protocol 69 command is required on interface Fa0/1 to forward TFTP requests to IP address The ip helper-address command is required on interface Fa0/0. 33 Which command is used to configure a summary route in BGP? summary-address ip summary-address aggregate-address ip aggregate-address 34 The IPv6 autoconfiguration feature enables a PC to automatically connect to an IPv6 network. What type of IPv6 address allows a PC host to send a router solicitation message requesting a prefix for stateless autoconfiguration? link local address site local address aggregatable global unicast address loopback address IPv4-compatible address flow-label address 35 What must an administrator do to add an interface to the IS-IS routing process for IP? under router isis, configure the network command with the IP address associated with that interface on the interface, configure the ip router isis command on the interface, configure the router isis command on the interface, specify the isis router type with the is-type command under router isis, configure the net command with the NSAP address associated with that interface

14 36 Based on the information in the diagram, which configuration is needed to redistribute RIP into OSPF? RTA(config)# router rip RTA(config-router)# redistribute ospf 10 metric 25 bandwidth RTA(config)# router rip RTA(config-router)# redistribute ospf metric 2 RTA(config)# router ospf 10 RTA(config-router)# redistribute rip metric 25 RTA(config)# router ospf 10 RTA(config-router)# redistribute rip metric A network administrator is configuring a new router into an existing OSPF network and notices that the router is stuck in the INIT state. What are three possible causes of this problem? (Choose three.) authentication enabled on only one side access list blocking OSPF hellos mismatched interface MTU duplicate Router IDs on neighbors layer 2 switches between the two routers are not configured to be multicast aware 38

15 From the figure, router RT2 and RT1 are having difficulty establishing an adjacency. The administrator has verified the IS-IS authentication and MTU configuration between the two routers. Which step should the administrator take next in determining the problem? Check for disabling of IS-IS hello padding. Check for mismatched Level 1 and Level 2 interfaces. Verify area configuration. Look for duplicate systems IDs. 39 Which three items are contained in a BGP update message? (Choose three.) route prefix AS path weight prefix length local preference 40 Support for which three items was added to IGMP Version 3? (Choose three.) input queue scheduling specific group leave messages multiple group membership output queue scheduling passive interfaces source filtering

16 What are the two types of multicast distribution trees? (Choose two.) sparse trees RP trees shared trees IGMP trees source trees dense trees 42 In IS-IS routing, which level is used to route between end systems and intermediate systems within the same area? level 0 level 1 level 2 level 3 43 What is the IPv6 loopback address a technician would ping to verify the IPv6 stack is loaded? 0::127:0:0:1 0::7f00:1 FE80::1 FE80::7f00:1 ::1 0::7f:0:0:1 44 Based on the configuration below, which of the following statements are true? RTA(config)# router bgp 100 RTA(config-router)# neighbor remote-as 100 RTA(config-router)# neighbor remote-as 300 RTA(config-router)# network RTA is going to advertise network to its neighbors if it is in the IP routing table. The neighbor at is an external peer. The neighbor at is an internal peer.

17 RTA is going to advertise that it is part of AS How many bits make up an IPv6 address? Which is a difference between the IS-IS and OSPF routing protocols? the use of hello packets to form and maintain adjacencies the DR and BDR election process the use of link-state databases and Dijkstra's algorithm the update, decision and flooding process 47 Observe the configuration. RTA has two serial links and an Ethernet stub network of /16. Which command must the network administrator use to have EIGRP summarize the stub network at the classful boundary? RTA(config-router)# auto-summary RTA(config-router)# IP auto-summary RTA(config-router)# no auto-summary The network administrator does not have to issue a command. 48

18 Refer to the exhibit. What is the result of the ip pim send-rp-announce Loopback0 scope 3 group-list 50 command that is shown in the configuration? The router sends Auto-RP messages to address announcing itself as an RP candidate for multicast group 3. The router sends Auto-RP messages to address announcing itself as an RP candidate for multicast group 3. The router sends Auto-RP messages to address announcing itself as an RP candidate for multicast groups identified by access-list 50. The router sends Auto-RP messages to address announcing itself as an RP candidate for multicast groups identified by access list 50. The router sends RP-to-group mapping messages to address announcing itself as an RP candidate for multicast group 3. The router sends RP-to-group mapping messages to address announcing itself as an RP candidate for multicast groups identified by access-list 50.

19 49 What is a feasible successor in EIGRP? a backup route that is kept in the routing table a backup route that is kept in the topology table a backup route that is kept in the neighbor table a protocol specific route that is kept in the routing table 50 Which two OSPFv3 configuration statements are true? (Choose two.) The command ipv6 ospf 1 area 0 must be given under router configuration mode. The ipv6 ospf 100 area 0 interface configuration command dynamically creates the ipv6 router ospf 100 process. The network router configuration command is required to enable OSPFv3 on an interface. The OSPF cost is configured on the interface. The OSPF router ID is configured on the interface. The router priority is configured in router configuration mode. 51 Which three attributes must be recognized by all BGP implementations? (Choose three.) ORIGINATOR_ID COMMUNITY ATOMIC_AGGREGATE LOCAL_PREF AS_Path MULTI_EXIT_DISC 52 What is the default priority value for all OSPF routers? Priority 0 Priority 1 Priority 8 Priority 10 Priority 255

20 53 Which of the following are features of CLNP? carries upper layer data and error indications over connectionless links carries lower layer data and error indications over connection-oriented links carries upper layer data and error indications over connection-oriented links carries lower layer data and error indications over connectionless links 54 What happens to packets that do not meet any of the defined match criteria of a route map? They are dropped. They are flagged as undeliverable. They are routed using the default route. They are routed through the normal routing process for forwarding. 55 IPv6 Stateless Address Autoconfiguration allows hosts themselves to configure a unicast IPv6 address on an interface when they learn a certain prefix from an attached router. What is that prefix? EUI-64 address DHCPv6 address DAD address link local address site local address anycast address Observe the configuration. The EIGRP subnets such as /16 and /16 are not being seen inside the OSPF domain. What is a possible reason for this? The redistribute command is missing the subnets keyword in the OSPF configuration. The redistribute command is missing the subnets keyword in the EIGRP configuration.

21 The network statement is wrong in the EIGRP configuration. The metric value is incorrect for EIGRP. The metric value is incorrect for OSPF. 57 Refer to the exhibit. Router RTA and router RTB have been configured to exchange routing information using OSPF. However, both routers never transition beyond 2WAY state. What is the cause of this problem? An access list on one side is blocking OSPF Hellos. Authentication is enabled on only one side. There is a switch problem and multicast capabilities are broken. The RTA and RTB interfaces have been configured with a priority of 0. There is a misconfigured neighbor statement on RTA. There is a misconfigured neighbor statement on RTB. 58Which attribute must be sent in the BGP update packet and must be recognized by all implementations of BGP?

22 well-known discretionary optional non-transitive well-known mandatory optional transitive 59Which statement is true regarding creating a multicast MAC address from a MAC address and an IP address? The first 24 bits of the IP multicast address are used for the first 24 bits of the multicast MAC address. The first 24 bits of the IP multicast address are used for the last 24 bits of the multicast MAC address. The last 23 bits of the IP multicast address are used for the first 23 bits of the multicast MAC address. The last 23 bits of the IP multicast address are used for the last 23 bits of the multicast MAC address. The 32 bits of the IP multicast address are used for the first 32 bits of the multicast MAC address. 60

23 Refer to the exhibit. Routers in area 2 have lost connectivity to the backbone area 0 after the OSPF authentication was configured on routers R1, R2, and R3. What should be done to correct the problem? OSPF plain text authentication must be configured on all interfaces in area 1. OSPF Message Digest 5 (MD5) authentication must be configured for the router interface in area 0. OSPF plain text authentication must be configured on both ends of the virtual link. OSPF Message Digest 5 (MD5) authentication must be configured on both ends of the virtual link.

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