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Internet Ages

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Submitted By rajeshbehera217
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CHAPTER – 1
INTRODUCTION TO INTERNET

WHAT IS A NETWORK?

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A network is a group of computers that are able to communicate with one another and share data, files, programs, and operations.

The computers in a network are connected via hardware and software. The hardware is what physically connects the computers in the network together. For example: telephone lines, fibre-optic cables, routers and gateways, and the computers themselves. The software is what enables us to use the hardware for communication and exchanging information. Just as your brain tells your body parts how to function and work together, the software governs the way computers in the network communicate with each other and perform functions. Software that enables networking follows a set of rules that are generally referred to as protocol.

Networks can be interoperable. This means that different types of computers, using different operating systems, can be connected, communicate with each other, and share information - as long as they follow the network protocols.
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In Summary:

A network is a group of two or more computers, connected together through a physical infrastructure, that are able to communicate and exchange information because they agree to use software that observes the same set of rules, or protocol.

WHAT IS THE INTERNET?

• A network of networks • Based on TCP/IP (Transmission Control Protocol/Internet Protocol) • Global • A variety of services and tools

A network of networks, or "internet," is a group of two or more networks that are:

• Interconnected physically • Capable of communicating and sharing data with each other • Able to act together as a single network

Machines on one network can communicate with machines on other networks, and send data, files, and other information back and forth. For this to work,

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