ZyXEL Communications ES-2048 24.5 SSH Overview, 24.6 How SSH works

ES-2048 User’s Guide

Table 56	Access Control: Logins (continued)
LABEL		DESCRIPTION
Apply		Click Apply to save your changes to the switch’s run-time memory. The switch
		loses these changes if it is turned off or loses power, so use the Save link on the
		top navigation panel to save your changes to the non-volatile memory when you
		are done configuring.
Cancel		Click Cancel to reset the fields.

24.5 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 85 SSH Communication Example

24.6 How SSH works

The following table summarizes how a secure connection is established between two remote hosts.

182 Chapter 24 Access Control