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When using hexadecimal, leading zeroes are always displayed to complete the 8-bit representation. Selected Decimal, Binary, and Hexadecimal Equivalents Decimal, Binary, and Hexadecimal Equivalents Given that 8 bits (one byte) is a common binary grouping, binary 00000000 to 11111111 can be represented in hexadecimal as the range 00 to FF, as shown in the next figure.
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Decimal and Binary Equivalents of 0 to F Hexadecimal Decimal and Binary Equivalents The figure compares the equivalent decimal and hexadecimal values for binary 0000 to 1111. Therefore, a 48-bit Ethernet MAC address can be expressed using only 12 hexadecimal values. Hexadecimal is used to identify an Ethernet address because a single hexadecimal digit represents four binary bits. The hexadecimal numbering system uses the numbers 0 to 9 and the letters A to F.Īn Ethernet MAC address consists of a 48-bit binary value. To understand hexadecimal, you must first be very familiar with binary and decimal. IPv6 addresses and Ethernet addresses are represented using the hexadecimal base sixteen number system. In networking, IPv4 addresses are represented using the decimal base ten number system and the binary base 2 number system.
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Now imagine that you can write 1 digit on a piece of paper. That’s why you’ll never see any other symbols being used in a mac address, apart from colons or dashes which are used as separators. Usually we use the first six symbols of the English alphabet, namely - a, b, c, d, e, and f. We already have 10 digits - 0 to 9, we need six more symbols. Its written in the number system which uses 16 digits, called the hexadecimal number system. The mac address that appears to be a string of length 12 is actually a number. In fact, the same is true for number systems using any number of digits, be it 2 (binary), 10 (decimal, the regular representation we use), or some other integer greater than 2. using 10 symbols - 0, 1, 2, …, 8, 9 can be represented in binary as well. All of the numbers that can be represented in the “regular” way, i.e. You already may know about binary, a number system where we only use two symbols - 0, and 1. This is because the MAC address representation you see is called hexadecimal. You might have noticed that your MAC address does not have any other alphabets than a, b, c, d, e and f. Why is the MAC address called 48 bit when it is 12 characters in length?