Four Major Concepts Are Discussed : 1. Data Communications 2. Networking 3. Protocols and Standardsy 4. Networking Models ♦ Networks exist so that data may be sent from one place to another - the basic concept of data communications. To fully grasp this subject, we must understand the data communications components, how different types of data can be represented, and how to create data flow. ♦ Data Communications between remote parties can be achieved through a process called #Networking, involving the connection of computers, media, and networking devices. Networks are divided into two main categories: local area networks (LANs) and wide area networks (WANs). These two types of networks have different characteristics and different functionalities. These two types of networks have different have different characteristics and different functionalities. The Internet, the main focus of the book, is a collection of LANs and WANs held together by internetworking devices. ♦ Protoc...
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