The document provides an introduction to computer networks. It discusses network topologies including bus, star, tree, ring and mesh. It describes the components of a network including physical media, networking devices, computers that can serve as clients or servers, networking protocols like TCP/IP, and applications like email, the web, and video conferencing. It also introduces concepts like LANs, MANs, WANs and the ISO/OSI reference model. The document appears to be an introductory lecture on computer networks covering fundamental topics at a high level.

1. INTRODUCTION TO
COMPUTER NETWORKS
Dr Piyush Kumar Shukla
Department of Computer Science & Engineering
University Institute of Technology-RGPV, Bhopal
M.P- INDIA
(Mobile No.:+91-9425378576, Email : piyush@rgtu.net

2. About Myself
About Myself
I am Associate Professor at Department of
Computer Science & Engineering (DoCSE), UIT-
RGPV, Bhopal
UIT-RGPV has one of the good government college
in in the Madhya Pradesh.
DoCSE-UIT-RGPV , Bhopal has around 600 Students
including First Years in B.Tech Course.
DoCSE-UIT-RGPV is running also M.Tech CSE course and
PhD in CSE.
I am B.E (2001) , LNCT, Bhopal and M.Tech (2005)
from SATI Vidisha, M.P, India, PhD from RGPV
Bhopal (2013) & Post Doctoral Fellow (2020) from
SVNIT-SURAT., Gujarat. Working in UIT-RGPV
Bhopal for more than 14 years (Approximate)

3. Course Content
Course Content
Lecture 1: Overview of the Course and Network
Fundamentals: 1 Hour
Lecture 2: Goal, Components, Architecture: 01 Hour.
Lecture 3: Classification, Types: 01 Hour
Layard Architecture: Protocol Hierarchy, Design
Issues: 1 Hour
Lecture 3: Interfaces & Services : 1 Hour
Lecture 4: Connection Oriented & Connectionless
Services: 1 Hour
Lecture 5: Service Primitives : 1 Hour
Lecture 5: Design Issues & It’s Functionality: 1 Hour
Lecture 6: ISO/OSI Reference Model : 1 Hour

4. Course Content
Course Content
Lecture 7:Principle, Model & Description of Various
Layers & Its Comparison With TCP/IP: 1 Hour
Lecture 8: Network Standardization: 1 Hour
Lecture 9: Queueing Model: Little’s Theorem : 1
Hour
Lecture 10: Queueing System: 1 Hour
Lecture 11: M/M/1, M/M/n, M/G/1.: 1 Hour
Lecture 12: M/M/m/m/Routing, VLAN, TCP and UDP:
2 Hour
Lecture 13: SNMP, Natting, Firewall and VPN: 2 Hour
Lecture 14: Internet and Internet Applications (DNS,
Email, Web..): 2 Hour

5. Course Content
Course Content
Lecture 13: Cisco Basics: 2 Hour
Lecture 14: Cisco Switch and Router Configuration :
2 Hour
Lab 5: Demo and Practice of Cisco Switch
Configuration : 2 Hour
Lab 6: Demo and Practice of Cisco Router
Configuration : 2 Hour
Lecture 15: DNS & Web Server Setup on Linux : 2
Hour
Lab 7: Demo and Practice of DNS and Web Server
Setup : 2 Hour
Lecture 16: Enterprise Network Implementation: 2
Hour

6. Course Content
Course Content
Lecture 17: Mail Server, Proxy Server & Firewall
Setup on Linux : 2 Hour
Lab 8: Demo and Practice of Mail Server , Proxy
Server and Firewall Setup : 2 Hour

7. References
Books
Andrew S. Tanenbaum, Computer Network, Prentice-
Hall
Doughlas E. Comer, Computer Networks and
Internet
http://www.cisco.com/public/support/tac/documentat
ion.html
http://www.redhat.com/docs
http://home.iitk.ac.in/~navi/sidbinetworkcourse

8. Grading Guidelines
Grading
Three Mid Semester Exams: Average of Actual
Marks in best of 02 midsem out of 3.
Lab Assignments: For Internal Examinations.
Minimum 75% attendance and minimum 35 % marks
are necessary to clear the course.

9. INTRODUCTION TO COMPUTER
NETWORKS
Introduction to Computer Networks
Computer Networks or Computing
Devices Network are a collection of
computing machines connected by a
medium, i.e. wireless or cables
(coaxial/optical fibre). It is intended to
send and receive data stored over the
network on other computing machines.
These devices are sometimes called
nodes.

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

11. 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)

12. 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)

13. 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

14. 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

15. 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.

16. 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.

17. 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

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

19. 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

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

21. 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

22. ISO (International organization for Standardization)/OSI
(Open Systems Interconnection model) Model

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

24. 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