ZyXEL Communications XS1930 Series - SSH Overview

Chapter 36 Access Control
XS1930 Series User’s Guide
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36.7.2 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 222 SSH Communication Example
36.7.2.1 How SSH works
The following table summarizes how a secure connection is established between two remote hosts.
Figure 223 How SSH Works