HCIE-Carrier IP (Written) - H31-161 Exam Practice Test

Question 1

As shown in the figure, RTA, RTB, and RTC use the OSPF protocol. The default cost value is used for links, and unicast routes converge on the entire network. The Loopback 0 interface is set to configure RTC as the RP or BSR. The SPT switching threshold uses the default value on RTB. The receiver joins the multicast group 225.1.1.1. The multicast source sends multicast data to the destination address 225.1.1.1. Which interface is the inbound interface in the (10.1.1.1, 225.1.1.1) entry on RTB?

A. Ethernet 2/0/0

B. Ethernet 1/0/0

C. Null

D. Ethernet 1/0/1

Correct Answer: B

Question 2

Which of the following can be implemented in an IP backbone network?

A. ISIS

B. MPLS

C. RIP

D. BGP

Correct Answer: A,B,D

Question 3

Which statement is false?

A. The SSM multicast provides a better access control scheme than the ASM multicast.

B. The PIM SM simultaneously supports SSM multicast and ASM multicast

C. The SSM multicast forwarding model does not require shared trees.

D. The SSM Mapping function can map the IS_IN(S,G) message of the IGMPv3.

Correct Answer: D

Question 4

In the VRP, which of the following authentication modes are supported by the secure shell (SSH)?

A. Rivest-Shamir-Adleman (RSA)

B. password-rsa

C. md5

D. password

Correct Answer: A,B,D

Question 5

Which of the following statements about the VPLS packet forwarding are true?

A. If a receive broadcast packet sent a remote PE, it forwards the packet only to the AC interface instead of other PEs.

B. If the destination MAC address of a packets is not a broadcast address and a PE has not learned the MAC address, the PE broadcast this packet in on VSI.

C. If a PE receives broadcast packets from a local user, the PE forwards the packets to all other interfaces In the same VSI and all other PEs.

D. If the destination MAC address of a packet is not a broadcast address and a PE has not learned the MAC address, the broadcast this packet in one VSI

Correct Answer: A,B,C

Question 6

Refer to the exhibit.

As shown in the figure, inter-AS VPN Option A is used. CE 1 and CE 2 belong to the same VPN.AS 100 and AS 200 run IGP and LDP, respectively. ASBRs communicate with each other through EBGP. The loopback interface address of CE 1 is 10.1.1.1/24. Suppose CE 2 can ping CE 1. Which router allocates an inner label when PE 2 forwards packets from CE 2 to CE
1?

A. P1

B. ASBR 2

C. PE 1

D. P2

E. ASBR 1

Correct Answer: B

Question 7

The Huawei router is the hop RD where the SSM mapping function is enabled at the interface. Some IGMPv2 hosts expect to receive (1.0.01,232.1.0.1) (1.0.0.1232.1.0.2), and (2.0.0,232.1.3.2) dat a. How can you satisfy the preceding requirement with the least configurations?

A. ssm-mapping 232. 1 308 2 00.1

B. ssm-mapping 232. 1. 0. 0. 24. 1. 0. 0. 1

C. ssm-mapping 232. 1.0. 2. 32. 1. 0. 0. 1

D. ssm-mapping 232.1.3.2 16.2.0.0.1

E. ssm mapping 232.1.3.1.24.2.0.0.1

F. ssm-mapping 232 1.0. 1 32. 1. 0. 0. 1

Correct Answer: A

Question 8

As shown in the figure, RTA connects to RTB and RTC. A TE tunnel is configured on RTA to reach RTC. The TE tunnel cannot be successfully established. However, CSPFbased path calculation is successful and RTA does not receive any PathErro messages. What are possible causes?

A. The reserved bandwidth is insufficient at interface RTB-2.

B. RSVP-TE is not configured at interface RTB-2.

C. Different authentication keys are configured on interfaces RTB-2 and RTC-1.

D. An interface address on RTB is the same as the address of interface RTA-1.

Correct Answer: B,C

Question 9

An IPTV bearer network requires the broadband TV (BTV), VOD, and near video on demand (NVOD) services. Video programs use the standard MPEG 4 codec format. Which of the following statements about the QoS policy are true?

A. To ensure the IPTV service quality on the user side, reserve 4 Mbit/s bandwidth for the IPTV service for each user and plan extra bandwidth for the broadband Internet service.

B. Ensure that the BTV service has a higher priority than the VOD/NVOD service, and forward the downstream traffic and some protocol packets, such as the IGMP and PIM packets in priority.

C. To ensure the IPTV service quality on the user side, reserve 2.5 Mbit/s bandwidth for the IPTV service for each user and plan extra bandwidth for the broadband Internet service.

D. Ensure that the VOD/NVOD service has a higher priority than the BTV service and guarantee QoS of both the upstream and downstream traffic.

Correct Answer: B,C

Question 10

As shown in the figure, IGP is configured on RT 1 and RT 2, and route 193.3.6.0/24 is configured on RT 2. Which of the following statements is correct? Suppose OSPF is used here. Configure an access control list (ACL) on RT 2 in system mode.
ACL 2000
rule 5 permit source 193.3.6.0 0.0.0.255
Configure a routing policy in system mode:
route-policy t permit node 1
if-match acl 2000
apply backup-nexthop 106.108.4.1
apply backup-interface Ethernet4/0/4
Configure the IP FRR in system mode:
ip frr route-policy tConfigure the ethe4/0/4 interface of RT 2:
ospf cost 100
Configure BFD on RT 2:
Enable BFD on Ethernet4/0/3
bfd b1 bind peer-ip 106.108.3.1 interface Ethernet4/0/3
discriminator local 1
discriminator remote 1
min-tx-interval 10
min-rx-interval 10
process-pst
commit

Configuration on RT 1:
Enable BFD on Ethernet7/0/3
bfd b1 bind peer-ip 106.108.3.2 interface Ethernet7/0/3
discriminator local 1
discriminator remote 1
min-tx-interval 10
min-rx-interval 10
process-pst
commit

A. The IP FRR function is enabled for the traffic bound for 193.3.6.0/24 on RT 2. It is unnecessary to configure the ethe4/0/4 interface on RT 2.

B. If apply backup-interface Ethernet4/0/4 is deleted, the backup forwarding entry can also be generated because apply backup-nexthop 106.108.4.1 takes effect.

C. Use a tester to send traffic from FE5 to FE6 after the BFD session becomes Up, run the undo ip address command in the ethe7/0/3 interface view on RT 1, and calculate the time for switchover based on the number of lost packets and packet receiving rate measured by the tester. The switchover takes less than 50 ms.

D. Except the entry nexthop:106.108.3.1, a backup forwarding entry nexthop:106.108.3.1 is also generated for the traffic bound for 193.3.6.0/24 in the FIB table.

Correct Answer: C,D

Question 11

Exhibit:

As shown in the figure, RTA and have one BGP session. To detect fault fast, the BFD for BGP feature needs to be configured on RTA and RTB. BGP-related configurations are as follows:

The only Ethernet link between RTA and RTB becomes faulty when the BGP neighbor session is in ESTABLISHED state and the BFD session is in the UP state. Which statements is true? (Note: BFD works in asynchronous mode)

A. The BGP session between RTA and RTB is interrupted when the BGP hold time (time duration is 180s by default) express.

B. RTB detect the fault faster than RTA.

C. RTA detect the fault faster than RTB.

D. RTA and RTB detect the fault simultaneously.

Correct Answer: B

Question 12

Which of the following are conditions for bringing the remote CCC connection Up? (ABE)

A. MPLS is enabled on the outbound interface of the public network.

B. MPLS LDP is enabled on the outbound interface of the public network.

C. If a next hop is specified in CCC configuration, a route to the next hop is available.

D. If an outbound interface is specified in CCC configuration, the outbound interface is Up.

E. The interface that is bound to a CCC connection is physically Up.

Correct Answer: A,D,E

Question 13

Which of the following statements about LDP-IGP synchronization are true?

A. The LDP-IGP synchronization means to postpone the route switchback until LDP completes convergence by suppressing the establishment of IGP neighbor relationships or setting the cost of route advertisement to the largest value.

B. The LDP and IGP synchronization involves four states: Init, Hold-down, Hold-max-cost, and Syncachieved.

C. The LDP-IGP synchronization involves three timers: Hold-down, Hold-max-cost, and Syncachieved.

D. The LDP and IGP synchronization helps shorten the time for switching traffic from the standby link back to the active link and the switchback can be complete within several milliseconds.

Correct Answer: A,B,D

Huawei HCIE-Carrier IP (Written) - H31-161 Exam Practice Test

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