H12-261_V3.0 Exam Dumps | Which of the following statements about MPLS is incorrect?

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Huawei.H12-261_V3.0.v2022-05-13.q148
Question 9

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Question 9/148

Which of the following statements about MPLS is incorrect?

A. MPLSThe length of the label is 20 bits and is used for packet forwarding.

B. LDP MP- The label space range of dynamic signaling protocols such as BGP is 16-1023.

C. 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.

D. MPLS supports multiple levels of label nesting, and the value of the S bit of the innermost label is 1.

Correct Answer: 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.

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