Chapter Summary
A GNU/Linux system attached to a network is probably communicating on an Ethernet, which may be linked to other local area networks (LANs) and wide area networks (WANs). Communication between LANs and WANs requires the use of gateways and routers. Gateways translate the local data to a format suitable for the wide area network, and routers make decisions about optimal routing of the data along the way. The most widely used network, by far, is the Internet.
Basic networking tools allow GNU/Linux users to log in and run commands on remote systems (ssh, telnet) and copy files quickly from one system to another (scp, ftp/sftp). Many tools that were originally designed to support communication on a single-host computer (for example, ...
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