Huawei Huawei Certifications H12-891 Questions & Answers

• Question 371:

  What is correct about the multicast message forwarding?

  A. RPF check failure indicates that the multicast data packets are received from a suboptimal interface, but the interface still receives multicast traffic and forwards it downstream

  B. IGMP snooping function can not control the range of multicast traffic in the Ethernet flood

  C. In the multicast transmission mode, the destination address of the message can specify the location of the receiver

  D. The source address of the multicast message is the unicast address

  Correct Answer: D

• Question 372:

  What information does this contain in a basic layer packet? (Multiple choice) A Data link layer header

  A. Upper-level data

  B. The network layer header

  C. path records

  D. Network Layer Tail

  Correct Answer: BC

• Question 373:

  S-4S supports multi-instance and multi-process, that is, on an IS-IS router, multiple VPN instances can be configured to associate with multiple IS-S processes, the following description of IS-IS multi-instance and multi-process, which are correct ?

  A. If an IS-IS router creates multiple IS-IS processes, each process is independent of each other

  B. 1 IS-IS processes can only be associated with 1 VPN instance

  C. 1 IS-IS processes can be associated with several different VPN instances

  D. 1 VPN instances can be associated with several different IS-IS processes

  Correct Answer: ABD

• Question 374:

  In the multi-level RR scenario, the first-level RR will be connected to a large number of second-level R, which may cause the BGP circuit of the first-level RR to overflow from the table Risk of R BGP routing table overflow?( Radio).

  A. ORF

  B. Route Control C. Route Aggregation

  C. Set the same Cluster-ID

  Correct Answer: C

• Question 375:

  If a router only needs to forward iPv6 packets, you do not need to configure any IPV4 agreements and addresses on that router.

  A. True

  B. False

  Correct Answer: A

• Question 376:

  What descriptions of the OSPF protocol are correct?

  A. AS-External-LSA describes the router's path to ASBR

  B. The cost value of the second type of external route is only the AS external cost value, ignoring the AS internal cost value C. AS-External-LSA does not belong in any region

  D. AS-External-LSA describes the path to the as outside of the route, and the scope of the flood is the AS outside

  Correct Answer: BC

• Question 377:

  The following description of ISIS's routed infiltration is correct?( Multi-select)

  A. ISIS routing penetrates | Can be used in Pv6 environments.

  B. Route penetration for ISIS can be deployed on Level-1 routers.

  C. Route penetration for ISIS does not include aggregated routes.

  D. Route penetration of ISIS does not cause neighbor concussions.

  E. Route infiltration of ISIS is used to prevent routing loops.

  Correct Answer: AD

• Question 378:

  The following statement about the VPNv4 address is wrongly described as ?

  A. By default, PE does not perform VPN-target filtering on received VPNv4 routes.

  B. Local PE sets up An Export Target for these routes before releasing VPNv4 routes learned from sites that are directly connected to them to other PEEs attributes, and are published with routes as extended community attributes for BGP.

  C. Carries the RD attribute when BGP publishes both reachable and unreachable VPNv4 routes.

  D. The VPNv4 address has a total of 12 bytes, including an 8-byte route identifier RD (Route Distingulisher) and a 4-byte IPv4 Address prefix.

  Correct Answer: A

• Question 379:

  The correct statement about the IGMP proxy is ? Multi-select

  A. The downstream interface of the IGMP proxy device generates multicast relay table items

  B. IGMP proxy can detect the link status with the linkage through the information of the member host joining/leaving the multicast group, and realize the rapid switching of the primary and standby device links

  C. IGMP proxy is typically deployed on devices between hosts that are members of the access device The

  D. IGMP proxy device cannot send query messages to downstream member hosts in place of the IGMP queryer to maintain group membership

  Correct Answer: ABC

• Question 380:

  If the OSPP protocol is running in the network , after configuring the non-backbone area in the OSPP area as the Totally Stub region, the ABR router sends a message to Totally. The Stub region issues an LSA with an LS ID of 0000, and what type of LSA is the LAS to?

  A. LSA5

  B. LSA2

  C. LSA1

  D. LSA3

  Correct Answer: D