WEFOUNDData Communications and Networks: An Engineering Approach


A computer network , or data network , is a digital telecommunications network which allows nodes to share resources. In computer networks, computing devices exchange data with each other using connections between nodes ( data links .) These data links are established over cable media such as wires or optic cables, or wireless media such as WiFi .

Network computer devices that originate, route and terminate the data are called network nodes. [1] Nodes can include hosts such as personal computers , phones , servers as well as networking hardware . Two such devices can be said to be networked together when one device is able to exchange information with the other device, whether or not they have a direct connection to each other. In most cases, application-specific communications protocols are layered (i.e. carried as payload ) over other more general communications protocols. This formidable collection of information technology requires skilled network management to keep it all running reliably .

Computer networks support an enormous number of applications and services such as access to the World Wide Web , digital video , digital audio , shared use of application and storage servers , printers, and fax machines , and use of email and instant messaging applications as well as many others. Computer networks differ in the transmission medium used to carry their signals, communications protocols to organize network traffic, the network's size, topology , traffic control mechanism and organizational intent. The best-known computer network is the Internet.

A computer network , or data network , is a digital telecommunications network which allows nodes to share resources. In computer networks, computing devices exchange data with each other using connections between nodes ( data links .) These data links are established over cable media such as wires or optic cables, or wireless media such as WiFi .

Network computer devices that originate, route and terminate the data are called network nodes. [1] Nodes can include hosts such as personal computers , phones , servers as well as networking hardware . Two such devices can be said to be networked together when one device is able to exchange information with the other device, whether or not they have a direct connection to each other. In most cases, application-specific communications protocols are layered (i.e. carried as payload ) over other more general communications protocols. This formidable collection of information technology requires skilled network management to keep it all running reliably .

Computer networks support an enormous number of applications and services such as access to the World Wide Web , digital video , digital audio , shared use of application and storage servers , printers, and fax machines , and use of email and instant messaging applications as well as many others. Computer networks differ in the transmission medium used to carry their signals, communications protocols to organize network traffic, the network's size, topology , traffic control mechanism and organizational intent. The best-known computer network is the Internet.

Data transmission also data communication or digital communications is the transfer of data (a digital bitstream or a digitized analog signal [1] ) over a point-to-point or point-to-multipoint communication channel . Examples of such channels are copper wires , optical fibers , wireless communication channels, storage media and computer buses . The data are represented as an electromagnetic signal , such as an electrical voltage , radiowave , microwave , or infrared signal.

Data transmitted may be digital messages originating from a data source, for example a computer or a keyboard. It may also be an analog signal such as a phone call or a video signal, digitized into a bit-stream for example using pulse-code modulation (PCM) or more advanced source coding ( analog-to-digital conversion and data compression ) schemes. This source coding and decoding is carried out by codec equipment.

Courses and textbooks in the field of data transmission [1] as well as digital transmission [2] [3] and digital communications [4] [5] have similar content.

A computer network , or data network , is a digital telecommunications network which allows nodes to share resources. In computer networks, computing devices exchange data with each other using connections between nodes ( data links .) These data links are established over cable media such as wires or optic cables, or wireless media such as WiFi .

Network computer devices that originate, route and terminate the data are called network nodes. [1] Nodes can include hosts such as personal computers , phones , servers as well as networking hardware . Two such devices can be said to be networked together when one device is able to exchange information with the other device, whether or not they have a direct connection to each other. In most cases, application-specific communications protocols are layered (i.e. carried as payload ) over other more general communications protocols. This formidable collection of information technology requires skilled network management to keep it all running reliably .

Computer networks support an enormous number of applications and services such as access to the World Wide Web , digital video , digital audio , shared use of application and storage servers , printers, and fax machines , and use of email and instant messaging applications as well as many others. Computer networks differ in the transmission medium used to carry their signals, communications protocols to organize network traffic, the network's size, topology , traffic control mechanism and organizational intent. The best-known computer network is the Internet.

Data transmission also data communication or digital communications is the transfer of data (a digital bitstream or a digitized analog signal [1] ) over a point-to-point or point-to-multipoint communication channel . Examples of such channels are copper wires , optical fibers , wireless communication channels, storage media and computer buses . The data are represented as an electromagnetic signal , such as an electrical voltage , radiowave , microwave , or infrared signal.

Data transmitted may be digital messages originating from a data source, for example a computer or a keyboard. It may also be an analog signal such as a phone call or a video signal, digitized into a bit-stream for example using pulse-code modulation (PCM) or more advanced source coding ( analog-to-digital conversion and data compression ) schemes. This source coding and decoding is carried out by codec equipment.

Courses and textbooks in the field of data transmission [1] as well as digital transmission [2] [3] and digital communications [4] [5] have similar content.

21.01.2018  · Data Communication & Computer Network Tutorial for Beginners - Learn Data Communication & Computer Network in …

Data transmission also data communication or digital communications is the transfer of data (a digital bitstream or a digitized analog signal) over a point-to-point ...

Data Communication and Computer Networks Page 3 1. Message. The message is the information ( data ) to be communicated. Popular forms of information include text ...


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