SECTION- A
Data communications concepts: Digital and analog transmissions-Modem, parallel and serial,
synchronous and asynchronous, Modes of communication: Simplex, half duplex, full duplex, Concept of
multiplexing, De-multiplexing.
Types of Networks: LAN, MAN, WAN
Network Topologies: Bus, Star, Ring, Mesh, Tree, Hybrid
Communication Channels: Wired transmissions: Telephone lines, leased lines, switch line, coaxial
cables-base band, broadband, optical fiber transmission.
SECTION- B
Wireless Transmission: (Standards and Specification) Microwave transmission, Infrared transmission,
Laser transmission, Radio transmission and Satellite transmission and Blue Tooth, Frequency Spectrum.
Communication Switching Techniques: Circuit Switching, Message Switching, Packet Switching.
Network Reference Models: OSI Reference Model, TCP/IP Reference Model, Comparison of OSI and
TCP/IP Reference Models.
SECTION- C
Data Link Layer Design Issues: Services provided to the Network Layer, Framing, Error Control (error
detection and correction code), Flow Control, Data Link Layer in the Internet (SLIP, PPP).
Types of Multiplexing: FDM, TDM, CDMA
SECTION- D
MAC sub layer: CSMA/CD/CA, IEEE standards (IEEE802.3 Ethernet, Gigabit Ethernet, IEEE 802.4
Token Bus, IEEE 802.5 Token Ring)
The Network Layer: Design Issues, Routing Algorithms: Optimality Principle, Shortest Path Routing,
Congestion Control Policies, Concept of Internetworking.