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UNIT - I
Introduction and The Physical Layer: Uses of Computer Networks, Network Hardware,
Network Software, Reference Model (OSI, TCP/IP Overview), The Physical Layer,
Theoretical Basis for Data Communication, Guided Transmission Media, Wireless
Transmission, Communication Satellites, Digital Signal Encoding Formats - NRZ-L, NRZI,
Bipolar-AMI, Manchester, Differential Manchester, Digital Modulation - ASK, FSK, PSK,
QPSK, Digitization - Sampling Theorem, PCM, DM, Analog Modulation - Introducing AM,
FM, PM, The Public Switched Telephone Network, The Mobile Telephone System.

UNIT - II
The Data Link Layer: Data Link Layer Design Issues, Error Detection and Correlation, Flow
Control Protocols, Stop-and-wait Flow Control, Sliding - Window Flow Control, Error
Control, Stop-and-wait ARQ, Go-back-N, Selective-repeat, Example of Data Link Protocols-
HDLC
The Medium Access Control Sub Layer: The Channel Allocation Problem, Multiple Access
Protocols, Ethernet, wireless LANs, Blue Tooth, 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 and Network Security: The Transport Service, Elements of Transport
Protocols, A Simple Transport Protocol, The Internet Transport Protocols; UDP, TCP,
Performance Issues.

TEXT BOOKS:
1. A. S. Tananbaum, "Computer Networks", 4th Ed., Pearson, 2003
2. W. Stallings, "Data and Computer Communications", 7th Ed., Pearson, 2002.