Computer Networks & Data Communication: A Clear Study Guide
COMPUTER NETWORKS & DATA COMMUNICATION A clear study guide to how devices connect, exchange information and share resources. WHAT YOU WILL LEARN Define key networking terms, explain how data moves, compare network sizes and communication modes, and describe common network layouts. 1. KEY TERMS A computer network connects two or more devices so they can communicate and share resources. Data communication is the transfer of information between devices through a wired or wireless transmission medium. Protocols are the agreed rules that govern how devices format, address and handle data. 2. HOW DATA TRAVELS A basic communication system has a source, transmitter, channel, receiver and destination. The network interface prepares and interprets signals, while protocols coordinate communication. 3. WHY USE A NETWORK? Networks let people share files, applications, printers and internet connections. They support fast communication and centralised backups. They also need maintenance and s...
