Refer the following table for easy conversion from binary to decimal and hexadecimal numbers. You can search for the OUI listings in following URLs. Refer below image to understand OUI (Organizationally Unique Identifier) part and NIC specific part of MAC addresses. Network Interface Controller specific number are assigned by manufacturer to the NIC. Next three bytes are Network Interface Controller Specific number. OUI (Organizationally Unique Identifier) numbers are assigned by the IEEE to te manufacturer. The first three bytes of the MAC address identifies the vendor who manufactured the product (Example: a NIC Card), and is known as OUI (Organizationally Unique Identifier). Type the command "ipconfig /all" in the prompt and Enter. To view the MAC Address of your network card when you are using Windows Operating System, run command prompt, cmd (Right-click Start > Run > type cmd and click "OK"). The first nibble 1010 from the left most byte in above example represent the first equivalent hexadecimal A in its hexadecimal representation, and the second nibble 1010 from the left most byte in above example represent the second equivalent hexadecimal A in its hexadecimal representation. In a MAC address, one hexadecimal digit resembles a group of four contiguous binary bits, called a nibble. MAC addresses are binary numbers which are represented in its hexadecimal equivalent. ![]() ![]() The scope of a MAC address is limited within a Local Area Network (LAN). MAC addresses are typically locally specific. MAC (Media Access Control) addresses are hard-coded into network adapter. MAC addresses are theoretically permanent numbers, which are burned into the network card.Įvery network adapter has a MAC (Media Access Control) address assigned to it when it is manufactured. The purpose of representing the binary address in hexadecimal format is to make it easier for humans to read and understand. There have been a few interesting comments on this post, I encourage you to read them if you want to learn more about this mechanism.Media Access Control (MAC address or Layer 2 addresses or physical address or hardware address) addresses are 48 bit (six bytes) binary addresses represented in hexadecimals. prepend the link-local prefix: fe80::5074:f2ff:feb1:a87fĪ converter to do the same operation in reverse is available here.replace first octet with newly calculated one: 5074:f2ff:feb1:a87f.convert octet back to hexadecimal: 01010000 -> 50.convert the first octet from hexadecimal to binary: 52 -> 01010010.reformat to IPv6 notation 5274:f2ff:feb1:a87f.take the mac address: for example 52:74:f2:b1:a8:7f.Here’s the conversion process step by step: ![]() This link-local IPv6 is infered from the NIC’s mac address.Ī mac address is 48 bits, an IPv6 address is 128 bits. Instead of getting an address via DHCP, a NIC will hop on the network with a link-local IPv6 address and with this will have to ability to do further configuration automatically (soliciting neighbors, router, et cetera). ![]() Link-local IPv6 addresses are used as part of the IPv6 network auto-configuration process.
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