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Free Huawei H12-261_V3.0 Exam Questions (page: 15)

Page 15 of 120
PDF with 479 Questions

Which of the following statements about MPLS is incorrect?

  1. MPLSThe length of the label is 20 bits and is used for packet forwarding.
  2. LDP MP- The label space range of dynamic signaling protocols such as BGP is 16-1023.
  3. in Pipe modeIn the TTL processing mode, IP packets are transmitted on the IPLS network, and the TTL value of IP packets is only divided between MPLS ingress and egress nodes.Don't subtract 1.
  4. MPLS supports multiple levels of label nesting, and the value of the S bit of the innermost label is 1.

Answer(s): B

Explanation:

Label: 20bit, label value range.
S: 1bit, the stack bottom identifier. MPLS supports multiple layers of labels, that is, label nesting.
When the value of S is 1, it indicates the bottommost label.Label space range:
0~15: Special label.
16 to 1023: Static LSP and staticCR-LSP (Constraint-based routed Label SwitchedPath) shared label space. 1024 and above: LDP, RSVP-TE (Resource Reservation Protocol-Traffic Engineering), MP-BGP (MultiProtocol Border Gateway Protocol) and other dynamic signaling protocol label space.



Which of the following operations can achieve fast fault detection on a multicast network? (Multiple Choice)

  1. Shorten Join/PHoldtime of rune messages
  2. lower interface sendTime interval for Hello messages
  3. Establish PI between neighborsM BFD session
  4. Reduce send Join/Prime interval for rune messages

Answer(s): B,C



If the PIM-SM protocol is run in the multicast network, RP needs to be configured. The configuration methods of RP are divided into dynamic RP and static RP. The following description of RP configuration is correct:

  1. configure dynamicWhen the RP is used, the BSR needs to be configured as the backup of the RP.
  2. configure staticWhen an RP is used, the BSR needs to be configured to advertise RP information.
  3. configure staticRP information needs to be specified on all PIM routers.
  4. configure dynamicWhen the RP is used, no BSR needs to be configured.

Answer(s): C

Explanation:

Static RP needs to be specified manually



The following are for the source side in PIM-SMWhich of the descriptions of the process of DR registering with RP is correct?

  1. The registration packet encapsulates multicast service data.
  2. RPA registration stop message is sent upon receipt of a registration message.
  3. The registration message is used to construct the RPT tree between the source DR and RP.
  4. The registration message is a multicast message.

Answer(s): A



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