单项选择题

You are trying to initiate an SSH connection to a remote router and are getting rejected with an error code of 0. Which of these might be the cause of the error?（）

A. The routers are using different SSH versions.
B. You are trying to log in using invalid credentials.
C. The RSA key pair is not properly configured on the SSH client.
D. The RSA key pair is not properly configured on the SSH server.

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单项选择题

When a Cisco router is configured for SSH, it acts as an （）?

A. SSH client
B. SSH proxy
C. SSH server
D. SSH and SSL server

单项选择题

On the Catalyst 6500 Series switch, which command is used to establish a console connection to the Firewall Services Module?（）

A. ssh
B. connect
C. login
D. session