Uses of MAC address : Useful in places where IP address change frequently. NIC helps in connection of a computer with other computers in the network. MAC address also known as physical address is the unique identifier that is assigned to the NIC (Network Interface Card) of the computer. IEEE global identifier standard that is associated with 48-bit MAC addresses. The most common notations are hexadecimal notation and bit-reversed notation, both of which format the MAC address in 6 groups of 2 hexadecimal digits. Notation conventions for MAC addresses vary, most of which are covered within this tool. By convention, these addresses are usually written in one of the following three formats, though there are variations. Traditional MAC addresses are 12-digit (6 bytes or 48 bits) hexadecimal numbers. The illustrated code given below shows how to generate a UUID for a given host, identified by its MAC address, using the uuid1 () function. Getnode () can be used to extract the MAC address of the computer. One way to represent them is to form six pairs of the characters separated with a hyphen (-) or colon(:). A valid MAC address must satisfy the following conditions: It must contain 12 hexadecimal digits. Given a string str, the task is to check whether the given string is valid MAC address or not by using Regular Expression.
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