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IP Address

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IP addresses are like army numbers for computers.

A number, by which a computer can be identified should it attempt to communicate via Internet Protocol.

Usually shown as four groups of up to three digits (like so: 127.0.0.1).

Because IP address are hard to remember for humans we use things calles URL's instead.

When one types in a URL like www.arrse.co.uk, your computer goes to a central phonebook of sorts and that phone book says that www.arrse.co.uk = 217.146.105.5

as you can see www.arrse.co.uk is far easier to remember that 217.146.105.5.