COMPUTER NETWORKS & INTERNET

The Term ‘Computer Network’ refers tothe process of interconnecting two or more computers

The process of interconnecting twoor more than two computers is referred as NETWORKING.

Applications of Computer Network

• Share Resources (Hardware / Software)

• Communication• Sharing files• Share Information

INTERNET

The Internet is a global web of networks and servers.

It connectspeople to people,businesses to people & businesses to businesses.

A network of networks. It is relatively easy to link to it It is a classic example of

decentralization and independence since no one really owns or controls it

ORIGIN OF INTERNET

5 MB hard drive in 1960’s

1 TB hard drive now

ORIGIN OF INTERNET

HISTORY TIMELINE OF INTERNET

1969

• ARPANET

1971

• First E-mail

1980

• NSFnet

1983

• TCP/ IP

1988 •First IRC (Internet Relay Chat)

1989 •www goes public

1996 •Major Search Engine Google

1999 •70million Computers connected with Internet

2001• Wikipedia the 1st free

Encyclopedia

2004• Facebook the social

media site

2005• YouTube was

introduced

2015• 3.2billion Internet

users

How Internet works?

Internet Service Provider

TRANSMISSION MEDIA

TRANSMISSION MEDIAGuided Media

Twisted Pair Cable

Coaxial Cable

Fiber – Optics Cable

Unguided MediaMicrowave

Radiowave

Infrared Rays

Twisted Pair Cable

Coaxial Cable

Fiber – Optics Cable

Microwaves

Radio waves

Infrared Rays

NETWORK TOPOLOGIES

TOPOLOGYHYBRID TOPOLOGY

BUS TOPOLOGY

STAR TOPOLOGY

RING TOPOLOGY

MESH TOPOLOGY

TREE TOPOLOGY

Bus Topology

Ring Topology

Star Topology

Tree Topology

Mesh Topology

Hybrid Topology

NETWORK CLASSIFICATION

LANLocal Area Network

MANMetropolitan Area Network

WANWide Area Network

APPLICATIONS OF INTERNET IN

BUSINESS

Applications of INTERN

ET in Busines

s

Gather Information

Collaborate with Others

Research Competitors

Sell Products & Services

Communicate Internally

Publish Information

Customer Support &

Service