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IP(InternetProtocol)
The Internet Protocol (IP) is used for unreliable data (divided into parts named packages) transport from one network unit to another. This means that there is no guarantee that a package will be delivered to a customer. Packages may arrive in the sequence different to that in which they were sent, may be damaged or not arrive at all. The guarantee of package delivery gives protocols of a higher level (transport), for example TCP uses IP as a mean of transporting.
In the Internet is used the IP of fourth version, known as IPv4 which provides a 32-bit address system. The current version of the Internet protocol (IPv4) allows for in excess of four billion unique addresses. This number is reduced drastically, however, by the practice of webmasters taking addresses in large blocks, a great part of which remains unused. There is a rather substantial movement to adopt a new version of the Internet protocol (IPv6), which would have two to the one-hundred twenty-eighth power of unique addresses. This number can be represented roughly by a three with thirty-nine zeroes after it.