What is the port number used by the FTP protocol control plane?

• A.21
• B.24
• C.22
• D.23

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In the switch MAC address table, which of the following entries will not age?

• A.Port MAC address table entry
• B.Device MAC address table entry
• C.Static MAC address table entry
• D.Dynamic MAC address table entry

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Which of the following commands can modify the device name to huawei?

• A.Do name Huawei
• B.Rename Huawei
• C.Sysname Huawei
• D.Hostname Huawei

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After the administrator successfully logs in to the router through Telnet, and finds that the router's interface IP address cannot be allocated, the possible reasons are ()

• A.SNMP parameter is incorrectly configured
• B.The Telnet user authentication mode is incorrectly configured
• C.The Telnet user level is incorrectly configured
• D.The administrator uses the telnet terminal software to prohibit the corresponding operation

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Switches running SIP protocol, the port needs to wait for the forwarding delay in the Learning state before it can be transformed into the Forwarding state.

• A.True
• B.False

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