COMPUTER NETWORKS JNTU-K MCA Second Sem

Syllabus

MCA2102

Computer Networks

UNIT-I

Introduction: Network Topologies WAN, LAN, MAN. Reference Models- The OSI Reference Model- the TCP/IP Reference Model - A Comparison of the OSI and TCP/IP Reference Models. Physical Layer –Introduction to Physical Layer-Data and Signals, Periodic Analog Signals, Digital Signals, Transmission Impairment, Data Rate Limits, Performance -Introduction to Guided Media- Twisted-Pair Cable, Coaxial Cable and Fiber Optic Cable and Unguided Media: Wireless-Radio Waves, Microwaves, Infrared.

UNIT-II

The Data Link Layer - Services Provided to the Network Layer – Framing – Error Control – Flow Control, Error Detection and Correction – Error-Correcting Codes – Error Detecting Codes. Elementary Data Link Protocols- A Utopian Simplex Protocol-A Simplex Stop and Wait Protocol for an Error Free Channel-A Simplex Stop and Wait Protocol for a Noisy Channel, Sliding Window Protocols-A One Bit Sliding Window Protocol-A Protocol Using Go-Back-N- A Protocol Using Selective Repeat.

UNIT-III

The Medium Access Control Sub Layer-The Channel Allocation Problem-Static Channel Allocation-Assumptions for Dynamic Channel Allocation, Multiple Access Protocols-Aloha-Pure Aloha- slotted Aloha-Carrier Sense Multiple Access Protocols- Collision-Free Protocols-Limited Contention Protocols. Wireless LAN Protocols- Ethernet-Classic Ethernet Physical Layer-Classic Ethernet MAC Sub-Layer Protocol-Ethernet Performance-Fast Ethernet- Wireless LANs-The 802.11 Architecture and Protocol Stack-The 802.11 Physical Layer-The802.11 MAC Sub-Layer Protocol- The 805.11 Frame Structure-Services.

UNIT-IV

The Network Layer Design Issues – Store and Forward Packet Switching-Services Provided to the Transport Layer- Implementation of Connectionless Service-Implementation of Connection Oriented Service- Comparison of Virtual Circuit and Datagram Networks, Routing Algorithms-The Optimality Principle-Shortest Path, Flooding, Distance Vector, Link State, Hierarchical. Congestion Control algorithms-General Principles of Congestion Control, Congestion Prevention Polices, Approaches to Congestion Control-Traffic Aware Routing- Admission Control-Traffic Throttling-Load Shedding. Internet Working: How Networks Differ- How networks Can be Connected- Tunneling, Internetwork Routing-, Fragmentation, Network Layer in the Internet – IP Protocols-IP Version 4 Protocol-, IP Addresses-, Subnets-IP Version 6-The Main IPV6 Header- Internet Control Protocols- ICMP-ARP-DHCP.

UNIT-V

The Transport Layer: Transport Layer Protocols: Introduction-Services- Port Number-User Data Gram Protocol-User Datagram-UDP Services-UDP Applications-Transmission Control Protocol: TCP Services- TCP Features- Segment- A TCP Connection- Windows in TCP- Flow Control-Error Control. Application Layer –- World Wide Web: HTTP , FTP-Two Connections-Control Connection-Data Connection-Security of FTP-Electronic Mail-Architecture- Web Based Mail- Email Security- TELENET-Local Versus Remote Logging.

Domain Name System: Name Space, DNS in Internet, - Resolution-Caching- Resource Records- DNS Messages- Registrars-Security of DNS Name Servers.