Ccna routing and Switching Complete Study Guide

Secure Shell (SSH)

Secure Shell (SSH) protocol sets up a secure session that’s similar to Telnet over a standard 

TCP/IP connection and is employed for doing things like logging into systems, running 

programs on remote systems, and moving files from one system to another. And it does all 

of this while maintaining an encrypted connection. Figure 3.4 shows a SSH client trying to 

connect to a SSH server. The client must send the data encrypted!

You can think of it as the new-generation protocol that’s now used in place of the anti-

quated and very unused 

rsh

 and 

rlogin

—even Telnet.