Practice problems to help understand scalable network systems.

The Internet began its life as a network connecting universities and research centers. Once it became available and affordable for consumers, it shot up in popularity and is now used by an estimated 4.5 billion people.

Check your understanding of the DNS (domain name system) and DNS spoofing, in this set of free practice questions designed for AP Computer Science Principles students.

Learn about the features that increase the scalability of the Internet.

This resource presents information on fiber optic network cable technology. Includes an introduction, optical transmitters, optical fiber, receivers, and designing a fiber optic system.

An article about the development of the Internet by Vinton G. Cerf. Includes a short biography of his career.