Computer Networks

CS3591    

COMPUTER NETWORKS       

COURSE OBJECTIVES:

•        To understand the concept of layering in networks.

•        To know the functions of protocols of each layer of TCP/IP protocol suite.

•        To visualize the end-to-end flow of information.

•        To learn the functions of network layer and the various routing protocols

•        To familiarize the functions and protocols of the Transport layer

UNIT I       INTRODUCTION AND APPLICATION LAYER       

Data Communication - Networks – Network Types – Protocol Layering – TCP/IP Protocol suite – OSI Model – Introduction to Sockets - Application Layer protocols: HTTP – FTP – Email protocols (SMTP - POP3 - IMAP - MIME) – DNS – SNMP

UNIT II     TRANSPORT LAYER

Introduction - Transport-Layer Protocols: UDP – TCP: Connection Management – Flow control - Congestion Control - Congestion avoidance (DECbit, RED) – SCTP – Quality of Service

UNIT III    NETWORK LAYER

Switching : Packet Switching - Internet protocol - IPV4 – IP Addressing – Subnetting - IPV6, ARP, RARP, ICMP, DHCP

UNIT IV    ROUTING

Routing and protocols: Unicast routing - Distance Vector Routing - RIP - Link State Routing – OSPF –       Path-vector routing - BGP - Multicast Routing: DVMRP – PIM.

UNIT V     DATA LINK AND PHYSICAL LAYERS

Data Link Layer – Framing – Flow control – Error control – Data-Link Layer Protocols – HDLC – PPP - Media Access Control – Ethernet Basics – CSMA/CD – Virtual LAN – Wireless LAN (802.11) - Physical Layer: Data and Signals - Performance – Transmission media- Switching – Circuit Switching.

PRACTICAL EXERCISES:

1.       Learn to use commands like tcpdump, netstat, ifconfig, nslookup and traceroute. Capture ping and trace route PDUs using a network protocol analyzer and examine.

2.       Write a HTTP web client program to download a web page using TCP sockets.

3.       Applications using TCP sockets like: a) Echo client and echo server b) Chat

4.       Simulation of DNS using UDP sockets.

5.       Use a tool like Wireshark to capture packets and examine the packets

6.       Write a code simulating ARP /RARP protocols.

7.       Study of Network simulator (NS) and Simulation of Congestion Control Algorithms using NS.

8.       Study of TCP/UDP performance using Simulation tool.

9.       Simulation of Distance Vector/ Link State Routing algorithm.

10.     Simulation of an error correction code (like CRC)

COURSE OUTCOMES:

At the end of this course, the students will be able to:

CO 1: Explain the basic layers and its functions in computer networks.

CO 2: Understand the basics of how data flows from one node to another.

CO 3: Analyze routing algorithms.

CO 4: Describe protocols for various functions in the network.

CO 5: Analyze the working of various application layer protocols.

TEXT BOOKS

1.       James F. Kurose, Keith W. Ross, Computer Networking, A Top-Down Approach Featuring the Internet, Eighth Edition, Pearson Education, 2021.

2.       Behrouz A. Forouzan, Data Communications and Networking with TCP/IP Protocol Suite, Sixth Edition TMH, 2022

REFERENCES

1.       Larry L. Peterson, Bruce S. Davie, Computer Networks: A Systems Approach, Fifth Edition, Morgan Kaufmann Publishers Inc., 2012.

2.       William Stallings, Data and Computer Communications, Tenth Edition, Pearson Education, 2013.

3.       Nader F. Mir, Computer and Communication Networks, Second Edition, Prentice Hall, 2014.

4.       Ying-Dar Lin, Ren-Hung Hwang, Fred Baker, “Computer Networks: An Open Source Approach”, McGraw Hill, 2012.