UNIT- I:
Introduction: Uses of computer networks, Network Hardware, Network Software, Reference
Models: The OSI Reference Model, The TCP/IP Reference Model, A Comparison of the OSI and TCP/IP Reference Models, Example Networks.
The Physical Layer: The Theoretical bass for data communication, Guided Transmission Media, Wireless Transmission, The Public Switched Telephone Network.

UNIT- II:
The Data Link Layer: Data Link Layer design issues, Error Detection and Correction,Elementary Data Link Protocols, Sliding Window Protocols, Example Data Link Protocols
The Medium Access Control Sub Layer: The Channel Allocation Problem, MultipleAccess Protocols, Ethernet, Data Link Layer switching.

UNIT- III:
The Network Layer: Network Layer Design Issues, Routing Algorithms, Congestion Control Algorithms, Quality of Service, Internetworking, The Network Layer in the Internet.

UNIT- IV:
The Transport Layer: The Transport Service, Elements of Transport Protocols, Congestion Control, The Internet Transport Protocols, Performance Issues.

UNIT-V:
Application Layer: Introduction, DNS, WWW and HTTP, FTP, E-mail, TELNET.