Refer to the exhibit. The network administrator wants to configure Switch1 to allow SSH connections and prohibit Telnet connections. How should the network administrator change the displayed configuration to satisfy the requirement?

To satisfy the requirement of allowing SSH connections and prohibiting Telnet connections, the network administrator should modify the transport input command. The current transport input all command allows all protocols, including Telnet, to be used to connect to the switch. To restrict the connections to only SSH, the command should be changed to:

This command will configure the switch to accept only SSH connections on the VTY lines, effectively prohibiting Telnet and enhancing the security of the switch’s remote management. The other options presented would not achieve the desired requirement:

• Using SSH version 1 would not be advised since it is less secure than version 2, which is already correctly configured with ip ssh version 2.
• Reconfiguring the RSA key is not necessary unless there is a specific issue with the key itself. The RSA key is used as part of the encryption process for establishing SSH connections.
• Configuring SSH on a different line is not required because the necessary lines (0-15) are already specified. The change needed is simply to restrict the protocols allowed on these lines.