Online Access Free Huawei.H12-821_V1.0.v2025-11-07.q582 Practice Test (Page 19)

H12-821_V1.0 Exam Question 86

Which of the following descriptions of multicast routing are correct? (Multiple choice)

A.Multicast routing protocols are used to establish and maintain multicast routes, and forward multicast packets correctly and efficiently.

B.Multicast routing protocols are divided into intra-domain multicast routing protocols and inter-domain multicast routing protocols.

C.Multicast routing protocols include IGMP protocol

D.If an upstream neighbor or downstream neighbor on the multicast distribution tree is unreachable, multicast routing will re-converge.

H12-821_V1.0 Exam Question 87

Regarding multicast MAC addresses, which of the following statements are incorrect? (Multiple choice)

A.A multicast MAC address uniquely corresponds to an IP multicast address

B.1 multicast MAC address correctly corresponds to 32 IP multicast addresses

C.The function of the multicast MAC address is to identify receivers belonging to the same multicast group on the link layer

D.The upper 24 bits of the multicast MAC address are 0x01005f, the 25th bit is fixed at 1, and the lower 23 bits of the MAC address are the lower 23 bits of the multicast IP address

H12-821_V1.0 Exam Question 88

About RP, which of the following statement is correct? (Multiple choice)

A.All routers in the PIM-SM network need to know the location of the RP

B.RP is elected by the BSR router

C.The RP in the PIM-SM network can only be specified manually

D.RP is the root of the RPT tree

H12-821_V1.0 Exam Question 89

A BGP device receives a route carrying an unknown attribute from a peer but does not know whether other devices need the attribute. In this case, the BGP device retains this attribute when advertising the route to other peers.
Which of the following attributes is of this type?

A.Community

B.AS Path

C.MED

D.OriginatorID

H12-821_V1.0 Exam Question 90

In the RSTP protocol, when the network topology changes, the mechanism to respond to the topology change is:

A.Whole network flooding

B.Partially delete the MAC address table

C.Modify the lifetime of the MAC address table

D.Delete the entire MAC address table

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