INTRODUCTION TOCOMPUTER NETWORKS

VINAYAK M.UMALE

Department of Electronics & Telecommunication EngineeringShri sant Gajanan Maharaj college of Engineering

(Ph : 07265 252116, Email : vmumale@ssgmce.ac.in)

About MyselfAbout 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 years

Course ContentCourse 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

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 ARQGo-Back-N ARQSelective Repeat ARQ

Lecture 18:

Standard Data Link Control Protocol-HDLC

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

Course Content

Course Content

Lecture 26,27:

Networking Devices

Lecture 28,29: Routing Algorithms

Lecture 30, 31: Least Cost Algorithms

Lecture 32:

Traffic Control

Course Content

Course Content

Lecture 33,34, 35:

ATM Network

Lecture 36: Frame Relay Network

Lecture 37, 38: ISDN & BISDN

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 45Internet Protocols Datagram, Datagram

Forwarding

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/documentation.html

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.

Introduction to Computer Networks

INTRODUCTION TO COMPUTER NETWORKS

Computer Networks

Computer network connects two or more autonomous computers.

The computers can be geographically located anywhere.

Introduction to Computer Networks

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)

Applications of Networks

Introduction to Computer Networks

Resource SharingHardware (computing resources, disks, printers)Software (application software)

Information SharingEasy accessibility from anywhere (files, databases)Search Capability (WWW)

CommunicationEmailMessage broadcast

Remote computing

Distributed processing (GRID Computing)

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

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

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.

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.

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

Network Components

Introduction to Computer Networks

Physical Media

Interconnecting Devices

Computers

Networking Software

Applications

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

Networking Devices

Introduction to Computer Networks

HUB, Switches, Routers, Wireless Access Points, Modems etc.

Computers: Clients and ServersIn 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

Networking Protocol: TCP/IP

Introduction to Computer Networks

Applications

E-mailSearchable Data (Web Sites)E-CommerceNews GroupsInternet Telephony (VoIP)Video ConferencingChat GroupsInstant Messengers Internet Radio

Introduction to Computer Networks

THANKS A LOT

Introduction to Computer Networks

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

Course Content

Course Content

Course Content

Course Content