Download Data communication principles : for fixed and wireless by Aftab Ahmad PDF

By Aftab Ahmad

ISBN-10: 0306477939

ISBN-13: 9780306477935

Data conversation ideas for fastened and instant Networks makes a speciality of the actual and information hyperlink layers. incorporated are examples that practice to a varied variety of upper point protocols corresponding to TCP/IP, OSI and packet dependent instant networks. functionality modeling is brought for novices requiring uncomplicated arithmetic. Separate dialogue has been incorporated on instant mobile networks functionality and at the simulation of networks. during the booklet, instant LANS has been given an identical point of therapy as mounted community protocols. it truly is assumed that readers will be acquainted with easy arithmetic and feature a few wisdom of binary quantity platforms.
Data conversation rules for fastened and instant Networks is for college students on the senior undergraduate and primary 12 months graduate degrees. it could possibly even be used as a reference paintings for execs operating within the components of information networks, laptop networks and web protocols.

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Sample text

With these rules set aside, the user has the flexibility of shopping around for different layers and adding equipment from many vendors to an existing network. 7. Summary A computer communications network is a complex system designed by many different, independent, software, hardware, and communication and networking professionals. The networking part mainly consists of designing efficient resource management methods and protocols to effect successful and reliable communication. Due to a large number of functions expected from protocols, their organization is very important according to their place in the process of communication.

7. The Application Layer The application layer specifies the network interface for user applications. The application program prepares data for communication and the application layer prepares the application header to be understood by the receiving application layer. The receiving application, after reading the header, provides information to the receiving application about how data has been arranged in the application packet. An example would make it a little clearer. Electronic mail is an application program.

Thus the specifications of the computer or hardware or operating systems play no role in interoperability of all the computers using the OSI architecture. The OSI reference model (OSI-RM) breaks communications into seven layers. Each layer has a well-defined scope of its functions clearly identifiable from other layers. User information enters one layer at a time. Only one layer is responsible of actually sending the bit stream on the channel. Layers on the same computer can communicate only with the adjacent layers.

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