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The domain-naming system essentially allows us to refer to computer resources in a more meaningful manner, such as www.cnn.com and email@example.com. In the first example, the name given is referred to as a fully qualified domain name (FQDN).
Addressing in TCP/IP, which falls in the OSI network layer, uses what is known as a 32-bit IP address. The phrase 32-bit means that 4 bytes are used to hold the data. The addresses usually appear to users in dotted-decimal form, such as 184.108.40.206.