Page 108 - Web Applications (803) Class 11
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When ARPANET and NSFNET were linked together, the network’s growth exploded. The TCP/IP protocol (communication
rules) served as a glue to bring together many heterogeneous networks into a single network. Thus, the Internet was
born. The Internet is a large network (network of networks).
Subject Enrichment
Video Session
Scan the QR code or visit the following link to watch the video: Evolution of the Internet
https://www.youtube.com/watch?v=km9-XQZkOSE
Now answer the following questions:
1. How many nodes were initially connected to ARPANET?
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2. Who invented the WWW?
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3. Who launched the first internet-enabled mobile phone?
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Do You Know?
• 75 million servers control the Internet.
• Over 550000 miles of underwater cable form the internet’s backbone.
• The internet connects roughly one billion computer systems.
• To answer a single Google search query, 1000 server computers are used in 0.2 seconds.
1.2 BASIC CONCEPTS OF NETWORKING
As we know, a group of people connected with each other through a social relation or similar interest. They can
communicate with each other and share thoughts and ideas. This kind of group of people is known as a social network.
Similarly, a group of computers that can communicate with one another across a shared medium is referred to as
a network. It is also known as a computer network. The overall process of connecting computers and exchanging
information between them is called networking. Networking includes computers that are to be connected, networking
protocols, software, and transmission media through which computers are connected and share information. Following
figure shows a computer network:
Workstation
Client
Server
Networking
Device
Workstation Client
Workstation Client
106 Touchpad Web Applications-XI

