In the process of tearing down the TCP connection as shown in the figure, the Y part of FIN should be filled with ______.

• A.q
• B.p+1
• C.p
• D.q+1

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If you want to upgrade the router but do not have a network cable, you can use the configuration cable and use the ______ protocol to upgrade through HyperTerminal.

• A.Zmodem
• B.TFTP
• C.Xmodem
• D.Ymodem

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The MSR router sends 5 packets by default in the last ping. If you want to specify the number of packets to be sent, you can use the ______ parameter.

• A.-d
• B.-s
• C.-c
• D.-n

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After configuring the relevant configuration of the Telnet service on the router, the router can be pinged from the PC, but the Telnet router fails, and the PC keeps showing that it is connecting to x.x.x.x. The possible reason is ______. (Multiple choice)

• A.The intermediate network routing configuration is incorrect
• B.The router Telnet service is not started
• C.The intermediate network prevents the PC from initiating a connection to the router's TCP port 23
• D.The Telnet password is incorrectly set

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The correct statement about STP, RSTP and MSTP is ______. (Multiple choice)

• A.STP cannot converge quickly. When the network topology changes, the originally blocked port will need to wait for a period of time before it becomes the forwarding state.
• B.MSTP is compatible with STP and RSTP.
• C.RSTP is an optimized version of the STP protocol. The delay for the port to enter the forwarding state is greatly shortened under certain conditions, which shortens the time required for the network to finally reach topological stability.
• D.MSTP can make up for the shortcomings of STP and RSTP. It can not only converge quickly, but also enable the traffic of different VLANs to be forwarded along their respective paths, thereby providing a better load sharing mechanism for redundant links.

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