AlcatelLucent.Selftestengine.4A0-107.v by.Ele.56q. Exam Code: 4A Exam Name: Alcatel-Lucent Quality of Service

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1 AlcatelLucent.Selftestengine.4A0-107.v by.Ele.56q Number: 4a0-107 Passing Score: 800 Time Limit: 120 min File Version: Exam Code: 4A0-107 Exam Name: Alcatel-Lucent Quality of Service

2 Exam A QUESTION 1 True of False: A proper end-to-end QoS solution is becoming more of an issue even as more bandwidth is being made available to today's bandwidth-intensive, interactive multimedia applications. A. True B. False Correct Answer: A /Reference: QUESTION 2 Which of the following are examples of metrics for QoS? A. Delay, jitter, packet loss B. Latency, FIFO, WRED C. Signal degradation, attenuation, line loss D. SNR, radial CODEC inversion, latency E. Inverse Queue Depletion, delay, packet loss Correct Answer: A /Reference: QUESTION 3 Which of the following are Ethernet SAP encapsulation types? Choose all that apply. A. Null B. Dot1Q C. Q-in-Q D. IPCP E. BCP-Null F. BCPdot1.q G. Frame Relay Correct Answer: ABC /Reference: QUESTION 4 Which of the following are not considered a differentiator/classifier of customer traffic at layer 2 or 3 of the OSI model? Choose all that apply.

3 A. DSCP B p C. IP Precedence D. TCP/UDP Port numbers E. HTML version Correct Answer: DE /Reference: QUESTION 5 Which of the following statements are true regarding the DSCP bits? Choose 3 answers. A. The precedence level bits define 4 Assured Forwarding Classes B. The three least significant bits of the DSCP bits specify the drop probability C. The 8 bits of the TOS field are used for DSCP D. To convert DSCP to IP Precedence the three most significant bits are matched E. DSCP provides for 64 precedence levels with 3 drop probabilities Correct Answer: ABD /Reference: QUESTION 6 Pick from the following list the 3 major components of the QoS features on the Alcatel-Lucent 7750 SR. A. Virtual inflow classification B. Real-timeQoS shaping C. Traffic classification D q p-bit rate-limiting E. Buffer memory management F. Traffic scheduling Correct Answer: CEF /Reference: QUESTION 7 The IOM is responsible for which of the tasks listed below? Choose 3 answers.

4 A. Local processing of critical control plane functions B. IPSec VPN hardware accelerated encryption C. Queuing, scheduling, and buffer management D. IP/MPLS/MAC forwarding lookup E. Layer 2 / Layer 3 encapsulation Correct Answer: CDE /Reference: QUESTION 8 Which of the following statement is true with regards to Q-in-Q on the Alcatel-Lucent 7750 SR? A. Q-in-Q defines a mechanism for encapsulating queued DSCP traffic at the provider edge B. Q-in-Q is a new protocol thatsupercedes 802.1p priority-bit mapping in a QoS-aware network C. The use of either the inner or outer 802.1p bits in the 802.1q frames forqos classification can be configured on the Alcatel-Lucent 7750 SR D. Q-in-Q is a protocol which re-encapsulates trunked p-bits in an outer label that is mapped into the EXP bits in an MPLS backbone E. none of the above Correct Answer: C /Reference: QUESTION 9 Which of the following are not categories of forwarding classes on the Alcatel-Lucent 7750 SR? Choose 3 answers. A. Real-time B. Assured C. Non-conforming D. High Priority E. Expedited Correct Answer: ACE /Reference: QUESTION 10 Which of the following are Trusted boundaries by default? Choose 2 answers. A. An IES SAP B. A VPLS SAP C. A network port D. A VPRN SAP E. An access port Correct Answer: CD

5 /Reference: QUESTION 11 True of False. There is a default network policy applied to all router interfaces? A. True B. False Correct Answer: A /Reference: QUESTION 12 Which of the following are characteristics of DSCP. Choose 3 answers? A. Part of the layer 3 header B. A 6-bit field of which the first 3 bits indicate the IP Precedence bits C. Specifies 8 different priorities D. Specifies 3 precedence levels E. Part of the layer 2 header F. Specifies 64 different per hop behaviors Correct Answer: ABF /Reference: QUESTION 13 Which of the following QoS policies does not have a default policy? A. Scheduler policies B. Service ingress C. Service egress D. Network queue E. Network F. Slope Correct Answer: A /Reference: QUESTION 14 Which of the following is not one of the ingress matching criteria for a network policy? Choose all that apply. A. TCP port numbers

6 B. LSP EXP C. DSCP D. Source and destination IP addresses E. Dot1P priority Correct Answer: AD /Reference: QUESTION 15 On the Alcatel-Lucent 7x50 SR, on what port is classification performed? A. Access ports B. Network ports C. Access ports with q-in-q encapsulation D. Both access and network ports E. Neither access or network ports Correct Answer: D /Reference: QUESTION 16 Which of the following are possible criteria for classifying packets at the network port ingress on the Alcatel- Lucent 7x50 SR? Choose all that apply. A. The EXP bits in the MPLS header B. The packet source and destination IP addresses C. The packet DSCP bits D. The dot1p bits in the frame header E. The ID of the SDP transporting the packet Correct Answer: ACD /Reference: QUESTION 17 A partial SAP-ingress policy configuration is shown below. A udp video stream is sent to a PC with IP address Given the SAP-ingress policy, to which Forwarding Class is the traffic matched?

7 A. AF B. EF C. H2 "Pass Any Exam. Any Time." - 7

8 Alcatel-Lucent 4A0-107: Practice Exam D. H1 E. BE Correct Answer: B /Reference: QUESTION 18 Fill in the blank. On the Alcatel-Lucent 7750 SR, sap-ingress policies can consist of up to queues per forwarding class for multipoint traffic. A. 64 B. 8 C. 3 D. 16 E. 1 Correct Answer: C /Reference: QUESTION 19 Which of the following statements are false regarding buffer pool allocation? Choose 2. A. Each network egress port receives its own buffer pool B. Each SAP-egress port receives its own buffer pool C. All SAP-ingress ports on the same MDA share a buffer pool D. All the network ingress ports on the same MDA share a buffer pool E. Each network ingress ports on the same MDA receives its own buffer pool Correct Answer: CE /Reference: QUESTION 20 Fill in the blanks with the correct entity. To manage the shared buffer space at network ports, slope policies are applied on for the ingress direction and on or for the egress direction. A. Interfaces, ports, SAPs B. Ports, ports, MDAs C. MDAs, MDAs, ports D. Interfaces, interfaces, MDAs E. MDAs, ports, interfaces Correct Answer: C /Reference:

9 QUESTION 21 True or False. By configuring queue 5 with a high-priority-only value of 0, in the network-queue policy, it means that all Out-of-Profile packets will be dropped? A. True B. False Correct Answer: B /Reference: QUESTION 22 A service provider has applied the sap-ingress policy configuration below on their customer's SAP. The service provider notices that all of the customer's traffic is being dropped at the SAP ingress. Which of the following actions would resolve the problem if applied on its own? Choose 2. A. Set the CIR of queue 3 to a non-zero value corresponding to the customer's expected bandwidth requirements B. Set the queue 3 to use Priority mode

10 C. Set the traffic classification of packets to be In-profile D. Set the High-priority-only value to 0 E. Map AF traffic to queue 1 Correct Answer: CD /Reference: QUESTION 23 Given that the slope-policy below has been enabled and applied on a network port, which of the following statements are true? Choose 3 answers. A. All out-of-profile traffic will be dropped before any in-profile is dropped B. The Time Average Factor of 0 will discard all packets arriving in the shared buffer pool C. When the shared buffer utilization reaches 51% in-profile packets may be dropped D. The highest probability with which an out-of-profile packet can be dropped is 20% E. When an in-profile packet arrives and the shared buffer utilization is just at 69% the packet will have approximately a 60% likelihood of being discarded

11 Correct Answer: ACE /Reference: QUESTION 24 Fill in the blank. The high-slope and low-slope are not activated in the default slope policy. Which of the following commands must be executed in order to activate them? A. Activate B. Apply C. Enable D. No disable E. No shutdown Correct Answer: E /Reference: QUESTION 25 True or False. WRED should not be used to avoid TCP Slow-Start synch problem? A. True B. False Correct Answer: B /Reference: QUESTION 26 A queue is configured with the following attributes and it is assumed that there is no CBS overbooking, and that the slope-policy is disabled. Queue attributes: MBS = 10KB CBS = 5KB High-Priority-Only = 20% If the current queue depth is 3KB what will happen to an out-of-profile packet arriving in the queue? A. It will be discarded because the High-priority-only threshold is exceeded B. It will be queued in the reserved portion of the buffer pool if there are no in-profile packets already in the queue C. It will be queued in the reserved portion of the buffer pool, and will remain out-of-profile D. It will be queue in the shared portion of the buffer pool, but will contend for shared buffer space with packets from other queues E. It will be queued in the shared portion of the buffer pool, but may be dropped if the buffer utilization has exceeded the low slope start-average value Correct Answer: C

12 /Reference: QUESTION 27 If a service provider does not want packets to make use of the shared buffer space when they are queued, what should be done? A. Set the CBS to 0 B. Set the MBS equal to the CBS C. Set the high-priority-only equal to MBS D. Set MBS equal to 0 E. Set high-priority-only equal to 0 Correct Answer: B /Reference: QUESTION 28 True or False. Shaping prevents excessive traffic from congesting the network and assuring that classified traffic conforms to SLAs, whereas Policing improves bandwidth utilization and minimizes packet loss. A. True B. False Correct Answer: B /Reference: QUESTION 29 What is the term used for the default method of scheduling queues in the Alcatel-Lucent 7750 SR? A. Single-tier B. Hierarchical C. Multi-tier D. Simple E. Dynamic Correct Answer: A /Reference: QUESTION 30 To implement Hierarchical QoS (Multi-tiered scheduling) which of the following actions are needed. Choose 3 answers. A. H-QoS capabilities must be enabled globally on the router B. A scheduler policy must be configured C. The queues in the sap-ingress and sap-egress policies require additional configuration attributes to

13 make use of the hierarchical schedulers D. The network queue policy must be configured to make use of the scheduler policy E. The scheduler policy must be referenced in the sap-ingress and sap-egress policies using it F. The scheduler policy must be applied on the service SAP Correct Answer: BCF /Reference: QUESTION 31 Scheduler policies are applied to the which of the following entities? Choose all that apply. A. Network ingress port B. epipe ingress SAP C. IES egress SAP D. Ingress MDA E. VPRN ingress interface F. Shared buffer space Correct Answer: BC /Reference: QUESTION 32 Fill in the blank. With hierarchical scheduling up to tiers are supported on the Alcatel-Lucent 7750 SR. A. 8 B. 3 C. 4 D. 5 E. 6 Correct Answer: B /Reference: QUESTION 33 Which QoS related policy is used to enable queue rates to be dynamic? A. Slope-policy B. Sap-ingress policy C. Network-queue policy D. Scheduler-policy E. Network policy Correct Answer: D

14 /Reference: QUESTION 34 Fill in the blank. Traffic assigned to forwarding classes is placed into queues and the contents of the queues are output in a controlled manner using. A. WRED B. Shapers C. Schedulers D. Markers E. Weighted Fair Queues (WFQ) Correct Answer: C /Reference: QUESTION 35 Given this scheduler-policy configuration, what can be said about the scheduler called igh? Choose 2 answers.

15 A. It is a parent scheduler B. It is the top level scheduler C. It will receive higher priority than scheduler low for bandwidth allocation D. It is a child scheduler E. It can only have queues as children Correct Answer: AD /Reference: QUESTION 36 Given the scheduler-policy below, how much bandwidth can the best effort traffic receive (PIR and CIR), when the ingress rate of each queue is 10Mbps?

16 A. PIR = 1Mbps, CIR = 1Mbps B. PIR = 0Mbps, CIR = 0Mbps C. PIR = 10Mbps, CIR = 2Mbps D. PIR = 5Mbps, CIR = 1Mbps E. PIR = 2Mbps, CIR = 2Mbps Correct Answer: A /Reference: QUESTION 37 Given the scheduler-policy below, which of the following can be done to guarantee that the Best Effort traffic receives its configured CIR value?

17 A. Change the Best Effort queue Level value to 8 B. Don't change anything. It is already guaranteed to receive its CIR C. Change the Best Effort queue CIR-Level value to 1 D. Change the CIR-Weight value of the AF queue to 0 Correct Answer: D /Reference: QUESTION 38 On the Alcatel-Lucent 7750 SR, ATM traffic is classified at the ingress SAP based on what two parameters? A. AAL5 q-bit and CLP bit B q outer label, impressed p-bits C. Q-in-Q, VCI/PCI D. Service category and CLP bit E. FRF.5 markings, FRF.8 DLCI

18 Correct Answer: D /Reference: QUESTION 39 Which of the following are not entities of the Alcatel-Lucent 7750 SR on which you can apply a networkqueue policy? Choose all that apply. A. Router interfaces B. MDAs C. SONET/SDH ports D. Ethernet ports E. Service SAPs Correct Answer: A /Reference: QUESTION 40 On the Alcatel-Lucent 7750 SR, which of the following QoS policy parameters can be overridden using QoS Runtime Instantiation? Choose 3 answers. A. High-priority-only in the SAP-egress policy B. Queue mode in the SAP-ingress policy C. Adaptation Rule in the SAP-ingress policy D. The Rate and CIR in the network queue policy E. The parent scheduler in the scheduler policy Correct Answer: ACE /Reference: QUESTION 41 Which of the following QoS functions does the slope-policy perform? A. Classification B. Marking C. Queuing D. Congestion Management E. Scheduling Correct Answer: D /Reference: QUESTION 42 True or False. The service provider has both a VLL (epipe) service and a VPLS service as shown in the

19 diagram below. At router PE B traffic arriving from both services will have the same network- queue policy applied. A. True B. False Correct Answer: A /Reference: QUESTION 43 True or False. If no QoS policies are configured and applied on the Alcatel-Lucent 7750 SR, the router will not be able to provide QoS. A. True B. False Correct Answer: B /Reference: QUESTION 44 On the Alcatel-Lucent 7750 SR which of the following QoS related policies can be configured on a SAP? Choose all that apply. A. Slope-policy B. Sap-ingress policy C. Sap-egress policy D. Network-queue policy E. Scheduler-policy Correct Answer: BCE /Reference:

20 QUESTION 45 Up to how many sap-ingress policies can be applied on a SAP? A. 1 B. 2 C. 3 D. 4 E. 5 Correct Answer: A /Reference: QUESTION 46 Which of the following is not a policy required to implement QoS on the Alcatel-Lucent 7750 SR? A. Sap-ingress policy B. atm-td-profile policy C. Network policy D. Accounting policy E. Network-queue policy Correct Answer: D /Reference: QUESTION 47 Given the sap-ingress policy below, which of the following statements are false?

21 "Pass Any Exam. Any Time." Alcatel-Lucent 4A0-107: Practice Exam

22 A. Queue 5 is using priority mode B. UDP traffic can be serviced at a maximum rate of 20 Mbps C. Ping traffic is put in queue 5 D. Queue 5 and queue 6 will receive equal portions of any remaining available bandwidth to meet their above CIR bandwidth requirements E. The schedulerigh must be a tier 1 scheduler Correct Answer: BDE /Reference: QUESTION 48 Which of the following is not a QoS related policy on the Alcatel-Lucent 7750 SR? A. Sap-ingress policy B. Network policy C. Marking-policy D. Scheduler-policy E. ssope-policy Correct Answer: C /Reference: QUESTION 49 Which of the following QoS functions does the network policy perform? Choose all that apply. A. Classification B. Marking C. Queuing D. Congestion Management E. Scheduling Correct Answer: AB /Reference: QUESTION 50 True or False. SAA provides real-time reporting tools and logging functionality. A. True B. False Correct Answer: B /Reference:

23 QUESTION 51 Which of the following statements does not describe configuration guidelines for QoS accounting policies? Choose 2 answers. A. One service accounting policy and one network accounting policy can be defined as default B. QoS accounting policies are enabled by default and require no configuration other than enabling the ability to parse the log file C. If statistics collection is enabled on a SAP or a network port and no accounting policy is applied, then the respective default policy is used D. If no default policy is defined then no statistics are collected unless an explicit accounting policy is applied E. Accounting policies are applied system wide and do not apply to a specific entity Correct Answer: CE /Reference: QUESTION 52 Which of the following is true about the SAA tool on the Alcatel-Lucent 7750 SR? Choose 2 answers. A. SAA allows two-way timing for several applications. This provides the carrier and their customers with data to verify that thesla agreements are being properly enforced B. SAA is an accounting mechanism that is used to measure the performance of the Services platform in meetingsla targets C. SAA implements two-way time measurements in requests from this node to the specified DNS server: This is done by performing an address request followed by an immediate release of the acquired address once the time measurement has been performed D. SAA determines the state of specific system metrics such as uptime, load and congestion and reports them inrealtime to a syslog server Correct Answer: AC /Reference: QUESTION 53 A network operator has configured the SAP-ingress policy below. Ping traffic is expected to be in queue 3. However, the netwok operator notices that all traffic is put in Queue 1. What is the most probale reason for this?

24 "Pass Any Exam. Any Time." Alcatel-Lucent 4A0-107: Practice Exam A. The default forwarding class for all traffic, including ICMP is BE which is put in Queue 1 B. The SAP has been shutdown C. Theip-match criteria has been mis-configured for ICMP traffic

25 D. Queue 3 has no rate or CIR configured and thus cannot hold any packets E. The SAP-ingress policy has not been applied to the SAP Correct Answer: E /Reference: QUESTION 54 Which of the following entities does the service-ping command verify from edge-to-edge? A. Tunnel connectivity B. Service existence C. Service provisioned parameter verification D. Round trip path verification E. all of the above Correct Answer: E /Reference: QUESTION 55 On the Alcatel-Lucent 7750 SR what is a practical way to stop an accounting policy from logging statistics without deleting it? A. Delete the SAP on which it is applied B. Shutdown the accounting policy C. Delete the service on which it is applied D. Shutdown the SAP on which it is applied E. Shutdown the service on which it is applied Correct Answer: B /Reference: QUESTION 56 A service provider has defined three sap-ingress policies to use for three different services they provide to their customers. These are the only three sap-ingress policies they want to use in their network. But one of their customers has a specific requirement to limit queuing delay on queue 5, and thus want to have a different MBS and CBS value than what has been configured in the three existing policies. What is the best way for the service provider to accommodate this customer? A. Use theqos runtime instantiation feature on this customer's SAPs B. Change one of the existing SAP-ingress policies to use one of the un-used queues and have its MBS=CBS=1 C. Create a new SAP-ingress policy just for this customer D. Convince the customer that one of their existing policies will satisfy their requirement E. Apply a scheduler policy on this customer SAP Correct Answer: A

26 /Reference: