Which of the following attributes cannot be used as a parameter to measure Cost?

• A.sysname
• B.Delay
• C.Hop count
• D.Bandwidth

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Which of the following protocols does the RA message used in IPv6 stateless autoconfiguration belong to?

• A.TCPv6
• B.UDPv6
• C.ICMPv6
• D.IGMPv6

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The following description of the Forwarding status in the spanning tree protocol is wrong (). ()*

• A.Ports in the Forwarding state must send BPDU message
• B.Ports in the Forwarding state can receive BPDU packets
• C.Ports in the Forwarding state can forward data packets
• D.The port in the Forwarding state does not learn the source MAC address of the packet.

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When planning a campus network, which of the following methods can be used to divide service VLANs? ()

• A.Divide VLAN into J by geographical area
• B.Divide vlan according to the access member structure
• C.Divide VLAN by logical area
• D.VLAN by business

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The MAC address table of existing switches is shown in the figure. Which of the following statements are correct? () (Single-choice question)

• A.Received a data frame with a source MAC address of 5489-9811-0b49 and a destination MAC address of 5489-989d1d30 from the port. Forwarded from the Eth0/0/2 port
• B.When the switch restarts, the MAC address learned by port Eth0/0/2 does not need to be relearned
• C.The data frame with the source MAC address of 5489-9885-18a8 and the destination MAC address of 5489-989d-1d30 is received from the port. It is forwarded from the Eth0/0/1 port
• D.When the switch restarts, the MAC address learned by port Eth0/0/2 does not need to be relearned

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