Cisco Certified Network Associate (CCNA) Practice Exam

In SSH configuration, which command allows SSH as a transport method?

1. (config-line)#transport input ssh

2. (config-line)#transport method ssh

3. (config-line)#ssh input transport

4. (config-line)#ssh enable

The correct answer is: (config-line)#transport input ssh

The command that allows SSH as a transport method is indeed specified correctly. The command "transport input ssh" is used in the configuration of a terminal line (such as console or vty lines) on a Cisco device to specify that the only method for incoming connections should be Secure Shell (SSH). This enhances security by ensuring that any remote management of the device is encrypted and protects against interception. By using this command, you configure the line to accept only SSH connections, thereby rejecting any other connection methods, such as Telnet, which transmit data in unencrypted form. This is a common best practice for securing network devices and is particularly relevant as SSH is widely accepted for its robust security features. For context on the other commands, some of them might seem similar but do not perform the same function as the correct command. For instance, the second choice mentions a "transport method" which is not a valid syntax in Cisco IOS, while "ssh input transport" and "ssh enable" do not correctly reflect how to set the transport method specifically for SSH. Overall, specifying "transport input ssh" is the correct approach to enforce the use of SSH for remote access on the configured line.