Free Access Huawei.H12-891_V1.0.v2023-07-31.q133 Practice Test (Page 15)

Question 66

Which of the following descriptions of MPLS header TTL are correct?

A.Can prevent wireless circular forwarding of messages

B.When copying TTL is disabled, tracert can see the LSR of the passing MPLS domain

C.MPLS has two ways of handling TTL, one is that the IP packet copies the PTTL of the MPLS header hen it enters the MPLS network Value; Another is to set the TTL of the MPLS header to 255 at the entrance LER

D.Copy IPTIL value is handled in such a way that the LSR of the MPLS domain is hidden, which plays a certain security role

Question 67

The network administrator is ready to use the 6to4 automatic tunnel to carry IPv6 data on the IPv4 network, and the IPv4 address of the router interface is 1381485210, so the corresponding tunnel address is
2001:8a0e:55d2:1:230:65ff:fe2:9a6?

A.True

B.False

Question 68

The following description of the Layer 6 functionality in the OSI reference model is correct?

A.Determines the availability of resources

B.Synchronous communication

C.Provides a common data compression and encryption scheme

D.Establishing, maintaining, and terminating communication sessions

Question 69

Regarding the tag space for MPLS, the description is incorrect

A.When the penultimate hop LSR performs a label swap, if the swapped tag value is found to be

B.Above 1024 is the tag space shared by dynamic signaling protocols such as LDP, RSVP-TE, MP-BGP, etc

C.16-1023 is a label control shared by static LSPs and static CR-LSPs

D.the tag is popped up by default and the message is sent to the last hop

Question 70

Regarding the mpLS handling mode of TTL, is the following description correct?

A.In MPLSVPI, if you need to hide the structure of the MPLS backbone network, you can use Uniform mode on Ingress for private network messages .

B.The TTL in the MPLS label has the same meaning as the TTL field in the head. TTL prevents mpLS networks from developing bad routing.

C.Unifore style, when an IP packet passes through the MPLS network, the IPTTL of the incoming node is minus l. The MPLS TTL field is a fixed value.

D.Pipe mode. When an IP message passes through the MPLS network, the IPTTL minus 1 is mapped to the WLSTTL field at the incoming node.

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Question 66

Question 67

Question 68

Question 69

Question 70

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