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UNIT – 1

Basic Concepts: Components of data communication, distributed processing, standards and organizations. Line configuration, topology, transmission mode, and categories of networks.

OSI and TCP/IP Models: Layers and their functions, comparison of models.

Digital Transmission: Interfaces and Modems: DTE-DCE Interface, modems, cable modems.

Transmission Media: Guided and unguided, Attenuation, distortion, noise, throughput, propagation speed and time, wavelength, Shannon Capacity, comparison of media.

                                                                                                                     

 

UNIT – II

Telephony: Multiplexing, error detection and correction: Many to one, one to many, WDM, TDM, FDM, circuit switching, packet switching and message switching.

Data Link control protocols: Line discipline, flow control, error control, synchronous and asynchronous protocols, character and bit oriented protocols, Link access procedures.

Point to point protocols: Transmission states, PPP layers, LCP, Authentication, NCP.

ISDN: Services, historical outline, subscriber’s access, ISDN, Layers, and broadband ISDN.    

 

UNIT – III

Devices: Repeaters, bridges, gateways, routers, The Network Layer, Design Issues, Routing Algorithms, Congestion Control Algorithms, Quality of Service, Internetworking, Network-Layer in the Internet.                                                                                               

 

UNIT – IV

Transport and upper layers in OSI Model: Transport layer functions, connection management, Functions of session layers, Presentation layer, and Application layer.

 

TEXT BOOKS:

1.         A. S. Tanenbaum, “Computer Networks”; Pearson Education Asia, 4^th Ed., 2003.

2.            Behrouz A. Forouzan, “Data Communication and Networking”, 3^rd edition, Tata Mc Graw Hill, 2004.

 

REFERENCES:

1.         D. E. Comer, “Internetworking with TCP/IP”, Pearson Education Asia, 2001

2.         William Stallings, “Data and computer communications”, Pearson education Asia, 7^th Ed., 2002.

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