Cloud Computing 09 Computer Network



This video introduces Computer Networks to the viewers.

What is a Computer Network?


A network of Computers is called as a Computer Network. The largest one out there is Internet. If there is a small network of Computers residing in a floor of an office, then it is called as a Local Area Network or LAN. 

If you connect couple of Local Area Networks that are spread across couple of buildings in an office, without using any of the distant-transmission technologies offered by a telecommunications company, then it can be referred as a Medium Area Network or MAN. Please note that I am using the phrase ‘It can be referred’ instead of ‘It is called as’ because the usage of the phrase ‘Medium Area Network’ is very ambiguous, nowadays. 

If you connect couple of Local Area Networks that are spread across couple of buildings in an office, without using any of the distant-transmission technologies offered by a telecommunications company, then it can be referred as a Medium Area Network or MAN. Please note that I am using the phrase ‘It can be referred’ instead of ‘It is called as’ because the usage of the phrase ‘Medium Area Network’ is very ambiguous, nowadays. 

Then if you connect multiple LANs which are spread across multiple cities or even globally using the technologies provided by telecommunications companies, then it is called as a Wide Area Network. 

For example, leasing couple of T1 lines from a telecommunication company to connect two LANs located in New York and London, can be called as a WAN or Wide Area Network. Nowadays, these three references are not strictly followed and so, I am getting these out of our way by quickly talking about them in this slide. Our main goal is, how does a Computer Network, work? Let us get to that now. 

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