Ssh Overview; How Ssh Works - ZyXEL Communications MS-7206 - EDITION 1 Manual

40.4 SSH Overview

Unlike Telnet or FTP, which transmit data in clear text, SSH (Secure Shell) is a
secure communication protocol that combines authentication and data encryption
to provide secure encrypted communication between two hosts over an unsecured
network.
Figure 158 SSH Communication Example

40.4.1 How SSH works

The following table summarizes how a secure connection is established between
two remote hosts.
Figure 159 How SSH Works
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Chapter 40 Access Control
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