In order to speed up the perception of link failures in the IS-IS network, IS-IS can be linked with BFD.

• A.TRUE
• B.FALSE

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After executing reset isis all, the IS-Is protocol process needs to be restarted and neighbors need to be re-established, and various IS-IS statistics will not be cleared.

• A.FALSE
• B.TRUE

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To ensure security, authentication can be configured in the OSPFv3 process area view.

• A.FALSE
• B.TRUE

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Regarding the role of ping and tracert, which of the following statements is correct?

• A.Ping verifies the reachability from the local end to the opposite end, it does not mean that the opposite end is always reachable to the local end
• B.Ping detects the two-way reachability between the correct end and the one-way icmp echo request packet
• C.Tracert has the same function as ping, but the name is different
• D.Tracert must be able to trace every hop IP address from source to destination

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MPLS is called multi-protocol label switching. Regarding the label description in MPLS, which of the following is correct? (Multiple choice)

• A.MPLS supports single-layer labels as well as multi-layer labels
• B.A label is an identifier with a fixed length and only local meaning, which is used to uniquely identify the FEC to which a group belongs
• C.MPLS system has a variety of label publishing protocols, such as LDP is a label publishing protocol
• D.The label is carried by the header of the MIPLS message and has a global meaning, that is, the label value of all routers cannot be repeated

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