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MCA 3 SEM. Subject: Computer Network
UNIT - 1 Introduction and Physical Layer Introduction: Goal and application Network Hardware and Software, Protocol Hierarchies, Design Issue of the layers, Interfaces and services, Connection oriented and connection less services, Service Primitives,Reference Models – The OSI Reference model, The TCP/IP Model, Types of computer Network LAN, MAN, WAN, Topologies, Transmission mode . Physical Layer Data and signal, Analog and digital Communication, Transmission Media, Concept of data transmission, Switching Techniques, Communication Satellites – Geosynchronous Satellite – VSAT, Low Orbit Satellites, ISDN and ATM.
UNIT - 2 Data Link Layer Data Link Layer design issues Data link control Framing, Flow control. Error Detection and Correction. DLC protocol : Stop and Wait Protocol, Sliding window protocol, A Simplex protocol for noisy channel, Medium access sublayer : Channel allocation : static and dynamic, Multiple access protocol FDDI, Data Link Layer in the Internet : SLIP, PPP. Wired and Wireless LAN protocol.
UNIT - 3 Network Layer The Network Layer Design Issue, IP addressing, Address mapping, Error reporting, Multicasting, Delivery, Forwarding and Routing. The Network Layer in the Internet : The IP Protocol subnets, Internet control protocols, internet multicasting.
UNIT - 4 Transport Layer The Transport layer services, The concept of client and server in terms of socket addressing Quality of service, Transport service primitives and buffering, Multiplexing, Crash Recovery. The Internet Transport Protocols (TCP/IP) - The TCP Service Model, The TCP protocol, The TCP segment header, TCP connection management, TCP transmission policy, TCP congestion control, TCP timer management, UDP.
UNIT - 5 Presentation and Application Layer Network Security, Traditional Cryptography, Private key cryptography and public key cryptography, Authentication protocols, DNS , SNMP, E-mail, application layer protocols.
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