This document provides an introduction to a course on computer networks taught by Vinayak M. Umale at Shri sant Gajanan Maharaj college of Engineering. It outlines Vinayak M. Umale's background and experience, provides an overview of the course content which will cover topics like networking devices, protocols, routing, and practical labs, and presents the grading guidelines for the course.

1. INTRODUCTION TO
COMPUTER NETWORKS
VINAYAK M.UMALE
Department of Electronics & Telecommunication Engineering
Shri sant Gajanan Maharaj college of Engineering
(Ph : 07265 252116, Email : vmumale@ssgmce.ac.in)

2. About Myself
About Myself
My self Vinayak M. Umale, Associate Professor,
Electronics and telecommunication Engineering
Dept.
SSGMCE has one of the largest networks in the
Shegaon.
SSGMCE Campus Network now has 2500 nodes providing
connectivity to more than 2500 users in Academic
Departments, Student Hostels and Residences.
SSGMCE has 18 Mbps Internet Connectivity.
All application servers (Mail, DNS, Proxy Caching, Web etc.)
are maintained in-house.
B.Tech (1988) and M.Tech (1997) from IIT Kharagpur
Working in SSGMCE, Shegaon for more than 22

3. Course Content
Course Content
Lecture 1:
Overview of the Course and Network Functions
Lecture 2,3:
Types of Networks, LAN, MAN, WAN
Lecture 4,5:
LAN Topologies-Mesh, Star, Bus, Ring
Lecture 6,7:
Layer Architecture: OSI Model& TCP/IP Model :
Lecture 8,9:
Switching Techniques-Circuit, Packet, Message, cell
VMUmale

4. Course Content
Course Content
Lecture 10, 11:
Peer to Peer Protocol, End to End, Hop to Hop
Connectivity
Lecture 12, 13, 14 :
Flow Control: Need,
Stop& wait flow control,
Sliding window flow control
Lecture 15,16, 17:
Error Control (ARQ)-Stop and wait ARQ
Go-Back-N ARQ
Selective Repeat ARQ
Lecture 18:
Standard Data Link Control Protocol-HDLC

5. Course Content
Course Content
Lecture 19:
LAN Architecture- LLC and MAC
Lecture 20,21:
Random Access Techniques- Pure Aloha system
and Slotted Aloha System
Lecture 22, 23:
Contention Techniques-CSMA, CSMA/CD
Lecture 24, 25:
Control Access Techniques- Token Bus,
TokenRing, Polling, FDDI

6. Course Content
Course Content
Lecture 26,27:
Networking Devices
Lecture 28,29:
Routing Algorithms
Lecture 30, 31:
Least Cost Algorithms
Lecture 32:
Traffic Control

7. Course Content
Course Content
Lecture 33,34, 35:
ATM Network
Lecture 36:
Frame Relay Network
Lecture 37, 38:
ISDN & BISDN

8. Course Content
Course Content
Lecture 39:
Overview of TCP/IP-TCP & UDP Frame Format
Lecture 40, 41, 42:
Internet Protocol and IP addressing issues
Lecture 43, 44:
Internet Protocols: ICMP, ARP, RARP
Lecture 45
Internet Protocols Datagram, Datagram Forwarding

9. References
Books
Behrouz A. Forouzan, Data Communication and
Networking, TMH
Andrew S. Tanenbaum, Computer Network, Prentice-
Hall
Willam stalling,Data and computer communication,
MM
Doughlas E. Comer, Computer Networks and
Internet
http://www.cisco.com/public/support/tac/documenta
tion.html

10. Grading Guidelines
Grading
Two ClassTest Exams: 5% each
TEC: 5%
Attendance: 5%
End Exam: 80%
Minimum 75% attendance and minimum 50% marks
are necessary to clear the course.

11. Introduction to Computer Networks
INTRODUCTION TO COMPUTER
NETWORKS

12. Computer Networks
Computer network
connects two or more
autonomous computers.
The computers can be
geographically located
anywhere.
Introduction to Computer Networks

13. LAN, MAN & WAN
Introduction to Computer Networks
Network in small geographical Area (Room, Building
or a Campus) is called LAN (Local Area Network)
Network in a City is call MAN (Metropolitan Area
Network)
Network spread geographically (Country or across
Globe) is called WAN (Wide Area Network)

14. Applications of Networks
Introduction to Computer Networks
Resource Sharing
Hardware (computing resources, disks, printers)
Software (application software)
Information Sharing
Easy accessibility from anywhere (files, databases)
Search Capability (WWW)
Communication
Email
Message broadcast
Remote computing
Distributed processing (GRID Computing)

15. Network Topology
The network topology
defines the way in
which computers,
printers, and other
devices are connected.
A network topology
describes the layout of
the wire and devices as
well as the paths used
by data transmissions.
Introduction to Computer Networks

16. Bus Topology
Commonly referred to
as a linear bus, all the
devices on a bus
topology are connected
by one single cable.
Introduction to Computer Networks

17. Star & Tree Topology
Introduction to Computer Networks
The star topology is the most
commonly used architecture in
Ethernet LANs.
When installed, the star
topology resembles spokes in
a bicycle wheel.
Larger networks use the
extended star topology also
called tree topology. When
used with network devices that
filter frames or packets, like
bridges, switches, and routers,
this topology significantly
reduces the traffic on the wires
by sending packets only to the
wires of the destination host.

18. Ring Topology
Introduction to Computer Networks
A frame travels around the ring,
stopping at each node. If a node
wants to transmit data, it adds the
data as well as the destination
address to the frame.
The frame then continues around
the ring until it finds the
destination node, which takes the
data out of the frame.
Single ring – All the devices on
the network share a single cable
Dual ring – The dual ring topology
allows data to be sent in both
directions.

19. Mesh Topology
The mesh topology
connects all devices
(nodes) to each other
for redundancy and
fault tolerance.
It is used in WANs to
interconnect LANs and
for mission critical
networks like those
used by banks and
financial institutions.
Implementing the mesh
topology is expensive
and difficult.
Introduction to Computer Networks

20. Network Components
Introduction to Computer Networks
Physical Media
Interconnecting Devices
Computers
Networking Software
Applications

21. Networking Media
Networking media can
be defined simply as
the means by which
signals (data) are sent
from one computer to
another (either by cable
or wireless means).
Introduction to Computer Networks

22. Networking Devices
Introduction to Computer Networks
HUB, Switches, Routers,
Wireless Access Points,
Modems etc.

23. Computers: Clients and Servers
In a client/server
network arrangement,
network services are
located in a dedicated
computer whose only
function is to respond
to the requests of
clients.
The server contains the
file, print, application,
security, and other
services in a central
computer that is
continuously available
to respond to client
requests.
Introduction to Computer Networks

24. Networking Protocol: TCP/IP
Introduction to Computer Networks

25. Applications
E-mail
Searchable Data (Web Sites)
E-Commerce
News Groups
Internet Telephony (VoIP)
Video Conferencing
Chat Groups
Instant Messengers
Internet Radio
Introduction to Computer Networks

26. THANKS A LOT
Introduction to Computer Networks

27. Course Content
Course Content
Internet Protocol (IP) and IP Addressing,Demo and
Practice of Setting up Subnets and IP
Address,,Routing, VLAN, TCP and UDP, SNMP,
Natting, Firewall and VPN, Internet and Internet
Applications (DNS, Email, Web..) , Cisco Basics, Cisco
Switch and Router Configuration, Lab- Demo and
Practice of Cisco Switch Configuration, Lab: Demo
and Practice of Cisco Router Configuration, DNS &
Web Server Setup on Linux, Lab: Demo and Practice
of DNS and Web Server Setup, Enterprise Network
Implementation, Mail Server, Proxy Server & Firewall
Setup on Linux, Lab 8: Demo and Practice of Mail
Server , Proxy Server and Firewall Setup

28. Course Content
Course Content

29. Course Content
Course Content