Which statement is wrong about the VRRP timer? (Multiple choice)

• A.By default, the period of VRRP notification messages is 2 seconds
• B.MASTER_DOWN = (3* ADVER_INTERVAL) + Skew_time
• C.Skew_Time=(255-Priority)/255
• D.By default, the VRRP preemption delay is 1 second

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In the RSTP protocol, when the network topology changes, the mechanism for responding to changes in the topology is?

• A.Delete the entire MAC address table
• B.Partial deletion of the MAC address table
• C.The MAC table remains unchanged
• D.Modify the lifetime of the MAC address table

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What parameters can the DHCPv6 server assign to the DHCPv6 client? (Multiple choice)

• A.STP server address
• B.Gateway address
• C.DNS server address
• D.IPv6 address prefix

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Which of the following BGP attributes are not required to be included in the Update message of BGP routing? (Multiple choice)

• A.Origin
• B.Local-Preference
• C.AS_PATH
• D.MED

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The ACL command ac1 [number] ac1-number [ match-order {autol config}], where ac1-numnbe is used to specify the number of the access control list, and the value range of ac1-number of the basic access control list is ().

• A.3000~3999
• B.0~1000
• C.2000 ~2999
• D.1000~3999

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