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Network Security Concepts: Viruses: Viruses are programs which replicate and attach to other programs in order to corrupt the executable codes.

The International Standards Organization created a model called the Open Systems Interconnection, which allows diverse systems to communicate. Data must be transformed to electromagnetic signals to be transmitted. Data can be analog or digital.

Analog data are continuous and take continuous values. Digital-to-digital conversion involves three techniques: line coding, block coding, and scrambling. Line coding is the process of converting digital data to a digital signal. Digital-to-analog conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data.

Bandwidth utilization is the use of available bandwidth to achieve specific goals. Transmission Medium: One which carries a signal from one computer to another.

A switched network consists of a series of interlinked nodes, called switches. The telephone, which is referred to as the plain old telephone system POTS , was originally an analog system. Data can be corrupted during transmission. Some applications require that errors be detected and corrected.

Data link control deals with the design and procedures for communication between two adjacent nodes: node-to-node communication. Data communications are the transfer of data from one device to another via some form of transmission medium. Multiple Access Protocol We can consider the data link layer as two sublayers.

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data communication and networking by behrouz a. forouzan 4th edition

To browse Academia. Skip to main content. By using our site, you agree to our collection of information through the use of cookies. To learn more, view our Privacy Policy. Log In Sign Up. Faizan Tahir. The five components of a data communication system are the sender, receiver, transmission medium, message, and protocol.

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Data Communication And Networking Study Notes

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Data communication and Networking MCQs by Behrouz A Forouzan

Network Security Concepts: Viruses: Viruses are programs which replicate and attach to other programs in order to corrupt the executable codes. The International Standards Organization created a model called the Open Systems Interconnection, which allows diverse systems to communicate. Data must be transformed to electromagnetic signals to be transmitted. Data can be analog or digital.

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