INTRODUCTION: Data Communications; Networks; the Internet;
Protocols and Standards; Layered tasks; The OSI Model and the layers in the
OSI model; TCP / IP Protocol Suite.
UNIT 2
DATA, SIGNALS, AND DIGITAL TRANSMISSION: Analog and digital
signals; Transmission impairment; Data rate limits; Performance; Digital-to-
Digital conversion; Analog-to-Digital conversion; Transmission modes.
UNIT 3
ANALOG TRANSMISSION AND MULTIPLEXING: Digital - to -
Analog conversion; Analog - to - Analog conversion; Multiplexing; Spread
spectrum.
UNIT 4
TRANSMISSION MEDIA, ERROR DETECTION AND
CORRECTION: Twisted pair cable, Coaxial cable, Fiber-Optic cable,
Radio waves, Microwaves, Infrared. Introduction to error detection /
correction; Block coding; linear block codes; Cyclic codes, Checksum.
PART – B
UNIT 5
DATA LINK CONTROL: Framing; Flow and Error control; Protocols;
Noiseless channels; Noisy channels; HDLC; Point-to-point Protocol -
framing, transition phases.
UNIT 6
MULTIPLE ACCESS, ETHERNET: Random Access; Controlled Access;
Channelization. Ethernet: IEEE standards; Standard Ethernet and changes in
the standard; Fast Ethernet; Gigabit Ethernet.
UNIT 7
WIRELESS LANS AND CONNECTION OF LANS: IEE 802.11;
Bluetooth. Connecting devices; Backbone Networks; Virtual LANs.