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Data Communications and Networking
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Provides a general idea of what we will see in the rest of the book. Four major concepts are discussed: data communications, networking, protocols and standards, and networking models. Networks exist so that data may be sent from one place to another-the basic con- cept of data communications. To fully grasp this subject, we must understand the data communication components, how different types of data can be represented, and how to create a 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 charac- teristics and different functionalities. The Internet, the main focus of the book, is a collection of LANs and WANs held together by internetworking devices.
Protocols and standards are vital to the implementation of data communications and networking. Protocols refer to the rules; a standard is a protocol that has been adopted by vendors and manufacturers.
Network models serve to organize, unify, and control the hardware and software com- ponents of data communications and networking. Although the term "network model" suggests a relationship to networking, the model also encompasses data communications.
Behrouz A. Forouzan - Personal Name
4th Edtion
978-0-07-296775-3
NONE
Data Communications and Networking
Information Technology
English
McGraw-Hill Companies. Inc
2007
New York
1-1,171
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