Huawei H31-161 Exam Dumps - Updated Apr 2024

Which of the following statements about the working principle of LDP FRR are true?

AAfter LDP FRR is enabled, a backup LSP is generated. Both the primary and backup LSPs are stored in the forwarding table.

BLDP FRR can be deployed on the ingress node and the intermediate node.The primary and backup LSPs are recorded in the ILM table on the intermediate node and in the FIB table on the ingress node.

CMultiple LSPs can be backed up on the ingress node, that is, entries about multiple backup LSPs are generated in the forwarding table according to the priority of the LDR FRR, implementing multilayer protection.

DAfter LDP FRR is enabled, a backup LSP can be generated for a primary LSP to prevent serious packet loss during fast flapping of the primary LSP

Question 2

Multicast configurations in PIM-SM are as follows:

multicast routing-enable

acl number 2000

rule 5 permit source 239.0.0.0 0.0.0.255

rule 10 deny

acl number 2999

rule 5 permit source 233.32.32.0 0.0.0.255

rule 10 deny#

interface Ethernet10/2/0

ip address 10.1.1.1 255.255.255.0

pim sm

interface LoopBack0

ip address 1.1.1.1 255.255.255.255

pim sm

interface LoopBack2

ip address 2.2.2.2 255.255.255.255

pim sm

interface LoopBack3

ip address 3.3.3.3 255.255.255.255

pim sm

pim

c-bsr Ethernet10/2/0

c-rp Ethernet10/2/0 priority 192

c-rp LoopBack0 group-policy 2000

c-rp LoopBack3

static-rp 2.2.2.2 2999 preferred

Based on the preceding configurations, which of the following statements about the mapping

relationships between the specified group and the RP are true?

AThe group address is 233.32.32.32 and the mapped RP address is 2.2.2.2.

BThe group address is 239.0.0.32 and the mapped RP address is 1.1.1.1.

CThe group address is 225.31.31.31 and the mapped RP address is 10.1.1.1.

DThe group address is 226.32.32.32 and the mapped RP address is 3.3.3.3.

Question 3

When the multicast source starts to send multicast data and no receiver joins in the RP in PIM-SM, which of the following statements are true?

AThe RP receives a registration message from the source DR, creates a multicast routing entry (S,
G), and sends a register stop message to the source DR.

BAfter the source DR unicasts registration information to the RP, the multicast routing entries (S,
G) of all source groups are generated in the RP but the outbound interface is null.

CAfter receiving a registration message, the RP creates the multicast routing entries (*, G) of all
source groups and sends a register stop message to the source DR.

DAfter all sources unicast registration information to the RP, no multicast route entries related to source groups are generated due to receiver absence.

Question 4

If a (*, G) entry exists in the RP, which of the following statements about the source registration

process are true in PIM-SM?

AThe first hop DR connecting to the source encapsulates received multicast data into PIM
registration information and unicasts the encapsulated information to the RP.

BThe first-hop DR connecting to the source sends received multicast data to the RP hop by hop.

CThe RP decapsulates registration information and uses RPT to send data packets to be sent to the multicast group to the outbound interface.

DThe RP sends an (S, G) Join message hop by hop to the first hop DR connected to the multicast source to add the multicast source to the SPT.

EThe RP unicasts a registration stop message to the first hop router connected to the multicast source.

Question 5

In PIM-SM, how does each router learn the location of the RP?

AThe router of the RP multicasts RP set information to all PIM routers.

BThe BSR multicasts RP set information hop by hop to all PIM routers.

CThe candidate RP router unicasts RP information to the BSR.

DThe BSR unicasts RP set information hop by hop to all routers

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