Computer Communication
Section 1 Introduction
1.1 COMMUNICATIONS
Computer communications is the process of sharing data, programs, and information between two or more computers. We have discussed numerous applications that depend on communication systems, including: • E-mail – Provides a fast, efficient alternative to traditional mail by sending and receiving electronic documents. • Instant messaging – Supports direct, “live” electronic communication between two or more friends or buddies. • Internet telephone – provides a very low cost alternative to long-distance telephone calls using electronic voice delivery. • Electronic commerce – buying and selling goods electronically
In this chapter, we will focus on the communication systems that support these many other applications. Connectivity, the wireless revolution, and communication systems are key concepts and technologies for the 21st century.
1.2 NETWORKING
Networking is a concept related using computer networks to link people and resources. For example, networking means that you can connect your microcomputer by telephone or other telecommunications links to other computers and information sources almost anywhere. With this connection, you are linked to the world of larger computers and mainframes and their extensive information resources. Thus, becoming computer competent and knowledgeable becomes a matter of knowing not only about connectivity through networks to microcomputers, but also about larger computer systems and their information resources.
A computer network is a communication system that connects two or more computers so that they can exchange information and share resources. Networks can be set up in different arrangements to suit user’s needs
1.3 TERMS
There are a number of specialized terms that describe computer networks
These terms include: • Node- any device is connected to a network. It could be a computer, printer, or data storage device • Client – a node that
1.1 COMMUNICATIONS
Computer communications is the process of sharing data, programs, and information between two or more computers. We have discussed numerous applications that depend on communication systems, including: • E-mail – Provides a fast, efficient alternative to traditional mail by sending and receiving electronic documents. • Instant messaging – Supports direct, “live” electronic communication between two or more friends or buddies. • Internet telephone – provides a very low cost alternative to long-distance telephone calls using electronic voice delivery. • Electronic commerce – buying and selling goods electronically
In this chapter, we will focus on the communication systems that support these many other applications. Connectivity, the wireless revolution, and communication systems are key concepts and technologies for the 21st century.
1.2 NETWORKING
Networking is a concept related using computer networks to link people and resources. For example, networking means that you can connect your microcomputer by telephone or other telecommunications links to other computers and information sources almost anywhere. With this connection, you are linked to the world of larger computers and mainframes and their extensive information resources. Thus, becoming computer competent and knowledgeable becomes a matter of knowing not only about connectivity through networks to microcomputers, but also about larger computer systems and their information resources.
A computer network is a communication system that connects two or more computers so that they can exchange information and share resources. Networks can be set up in different arrangements to suit user’s needs
1.3 TERMS
There are a number of specialized terms that describe computer networks
These terms include: • Node- any device is connected to a network. It could be a computer, printer, or data storage device • Client – a node that