What is the command to configure VRRP preemption delay?

• A.vrrp vrid 1 preempt-delay 20
• B.vrrp vrid 1 preempt-timer 20
• C.vrrp vrid 1 timer delay 20
• D.vrrp vrid 1 preempt-mode timer delay 20

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When configured ISIS the area authentication, which ISIS packets will carry the Bands authentication information?

• A.SNP and LSP of LeveL-2 of ISIS.
• B.Hello packets of Level-2 of ISIS.
• C.Hello packets of Level-1 of ISIS.
• D.SNP and LSP of Level-1 of ISIS.

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Which of the following are used in Ethernet networks? (Multiple Choice)

• A.Canonical format MAC addresses.
• B.802.3 encapsulated frames
• C.Non-Canonical format MAC addresses.
• D.802.5 encapsulated frames.
• E.CSMA/CD for media access.

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A router running IS-IS, and its output information is as shown in the figure. Which of the following statements is correct?

• A.The circuit-level of S4/0/0 is Level-1
• B.S4/0/0 interface supports IPv6
• C.The period of sending IIH on the S4/0/0 interface is 30s
• D.The Cost value of the S4/0/0 interface is 20

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Which descriptions are correct about the BGP reflector? (Multiple Choice)

• A.The route reflector can advertise other clients and non-clients from the routes learned from one client.
• B.The route reflector can advertise the routes learned from the non-client to all clients.
• C.The route reflector can advertise all clients and non-clients from routes learned from IBGP neighbors.
• D.IBGP neighbor relationships need to be fully interconnected without a route reflector. The introduction of route reflectors can reduce the requirements for full interconnection

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