📖 1. Introduction of Data Communication & Networks

📖 From Data Communication and Networks • 220 questions available

About 1. Introduction of Data Communication & Networks

Data communication is the process of transferring data from one device to another through a transmission medium, such as a wire or wireless signal. For this exchange to be successful, the system must meet five key criteria: delivery (sending data to the correct destination), accuracy (receiving data without alteration), timeliness (delivering video and audio without delay), jitter control (maintaining consistent packet arrival times), and security (protecting data from unauthorized access).

A network is a collection of devices connected by communication links that allows them to share resources and information efficiently. Networks can be categorized by their size and scope, ranging from small Personal Area Networks (PANs) connecting personal devices to massive Wide Area Networks (WANs) spanning entire countries. Understanding these basics helps students grasp how individual computers collaborate to form the global internet infrastructure we use daily.

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🔄 Last updated: 2026-07-31