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                   Data Communication and Networking

Unit I FUNDAMENTALS OF DATA COMMUNICATION
Data Communication: Definition of Data and Data communication,
Components of Data Communication, Data Representation (Text,
Image, Numbers, Audio, Video), Data Flow (Simplex, Half Duplex, Full
Duplex)
Network: Network Criteria: Performance (Throughput and Delay),
Reliability, Security -Types of Network Connections (Point-to-Point and
Multipoint) – Network Topologies: Star, Bus, Ring, Mesh – Network
Categories (LAN, MAN, WAN) and Interconnection of networks
Network Architecture: Layered Approach : ISO-OSI Model & TCP/IP
Model – functions of each layer

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Unit II PHYSICAL LAYER
Multiplexing: Definition of Mulitplexing – Frequency Division
Multiplexing (FDM),Wavelength Division Multiplexing (WDM),
Synchronous Time-Division Multiplexing (TDM)
Transmission media: Guided Media: Twisted pair – UTP and
connectors (RJ-45 Male and Female connectors), STP cables, Coaxial
cable and connectors (BNC connector), Fiber-optic cables, cable sizes
and connectors (SC, MT-RJ, ST, LC, FC) – Performance, and
applications of UTP, Coaxial and Fiber-Optic cables – Unguided Media
(Wireless Media): Radio waves, Microwaves, Infrared and their
applications
Switching: Circuit-Switched Network, Packet Switched Network
(Datagram approach), Virtual Circuit network

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Unit III DATA LINK LAYER
Framing of data: Definition, Types: Fixed Size and Variable Size
framing– Flow and Error control
Flow Control: Noiseless Channel: Definition, Stop and Wait protocol –
Concepts and Flow Diagram – Noisy Channel: Definition, Stop-and-Wait
ARQ protocol, Go-Back–N ARQ Protocol, Selective Repeat ARQ Protocol
– Concepts and Flow Diagram only
Error Control: Concepts of Error Detection and Error Correction –
types of error detecting and error correcting codes (definition only)

unit IV NETWORK LAYER
Network Devices: Hub, Switch, Router, Bridge, Gateway (definition
only)
Logical addressing: IP Addressing: Dot-Decimal Notation of IPv4 –
Classful and Classless addressing – IPv4 datagram format – Basics of
IPv6 – Need for transition from IPv4 to IPv6 – IPv6 datagram format –
Subnetting (only definition and subnet masks for each IP class) – Static
IP and Dynamic IP: Definition and applications
Network Layer Protocols: IGMP, ICMP, ARP, RARP (definitions and
functions only)

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Unit V TRANSPORT LAYER, APPLICATION LAYER AND NETWORK

SECURITY

Transport Layer: Connection-oriented and Connectionless Services –
TCP Features – TCP segment format – User datagram format (UDP
packet)
Application Layer: Concepts of DNS – SMTP – FTP – HTTP – WWW
(World Wide Web)
Network Security: Data Encryption and Decryption

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REVISION 5
TOTAL HOURS