Code.org
HTTP and Abstraction on the Internet
Introduce your class to the layers of abstraction of the Internet with a instructional activity on the HTTP protocol. Pupils review previous lessons on levels of the Internet, then investigate new high levels by examining the...
University of South Florida
Florida Center for Instructional Technology: What Is Networking Hardware?
Clickable network map shows information on the types and uses of networking hardware. Very basic introduction.
Computer Hope
Computer Hope: Tips Relating to Linux and Unix
A listing of various tips that can be used with most Linux and UNIX.