| IPv6 Network - HEXADECIMAL AND BINARY REPRESENTATION |
IPv6 Network - HEXADECIMAL AND BINARY REPRESENTATION
Numbers are stored in binary representation in computer memory; in other words, as strings of zeros and ones. These binary values can easily be converted back and forth to our regular decimal representation when necessary. But when such numbers become sufficiently large, the conversion between binary and decimal becomes inconvenient because the decimal numbers get too large. In IPv4, this inconvenience is avoided by converting the 32-bit address to decimal as four groups of 8 bits. This solution has the additional benefit that it allows us to easily determine that 192.168.0.69 and 192.168.0.95 fall within the same address range. Doing the same for 3221291245 and 3221291271 (the same 32-bit addresses converted to decimal numbers) would be much harder. IPv6, on the other hand, takes advantage of the fact that hexadecimal digits represent an even number of bits, as shown in the following table.
A “subnet” or “link” is a part of the network where the connected systems share an address range and can communicate with each other without involvement from a router. The most common example is an Ethernet network with one or more switches or hubs.
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