Part A
Computer Networks: Uses of computer Networks, Goals and applications
of networks, Computer Network Structure and Architecture, Reference
models: OSI model
Physical Layer: Concept of Analog & Digital Signal, Bandwidth,
Transmission Impairments: Attenuation, Distortion, Noise, Multiplexing :
Frequency Division, Time Division, Wavelength Division, Introduction to
Transmission Media : Twisted pair, Coaxial cable, Fiber optics, Wireless
transmission (radio, microwave, infrared)
Data Link Layer: Design issues, Framing, Error detection and correction
codes: parity, checksum, CRC, hamming code, Data link protocols for noisy
and noiseless channels, Sliding Window Protocols: Stop & Wait ARQ, Goback-
N ARQ, Selective repeat ARQ, Data link protocols: HDLC and PPP.
Network Layer: Design issues, IPv4 classful and classless addressing,
subnetting, Routing algorithms: distance vector, Congestion control:
Principles of Congestion Control, Congestion prevention policies, Leaky
bucket and token bucket algorithms
Medium Access Sub-Layer: Static and dynamic channel allocation,
Random Access: ALOHA, CSMA-CA/CD protocols, Controlled Access:
Polling, Token Passing
Transport Layer: Elements of transport protocols: addressing, connection
establishment and release, flow control and buffering, multiplexing and demultiplexing,
crash recovery, introduction to TCP/UDP protocols and their
comparison.
Application Layer: World Wide Web (WWW), Domain Name System
(DNS), E-mail, File Transfer Protocol (FTP)
TCP/IP model, Comparison of TCP/IP and OSI models.
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