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The IEEE has a target lifetime of 100 years (until 2080) for applications using EUI-48 space and restricts applications accordingly. The IEEE manages allocation of MAC addresses, originally known as MAC-48 and which it now refers to as EUI-48 identifiers. This 48-bit address space contains potentially 2 48 (over 281 trillion) possible MAC addresses. The IEEE 802 MAC address originally comes from the Xerox Network Systems Ethernet addressing scheme. The b0 bit distinguishes multicast and unicast addressing and the b1 bit distinguishes universal and locally administered addressing. However, two NICs connected to two different networks can share the same MAC address. Network nodes with multiple network interfaces, such as routers and multilayer switches, must have a unique MAC address for each NIC in the same network. MAC addresses are formed according to the principles of two numbering spaces based on Extended Unique Identifiers (EUI) managed by the Institute of Electrical and Electronics Engineers (IEEE): EUI-48, which replaces the obsolete term MAC-48, and EUI-64. The address typically includes a manufacturer's organizationally unique identifier (OUI). Many network interfaces, however, support changing their MAC address. Each address can be stored in hardware, such as the card's read-only memory, or by a firmware mechanism. MAC addresses are primarily assigned by device manufacturers, and are therefore often referred to as the burned-in address, or as an Ethernet hardware address, hardware address, or physical address. As typically represented, MAC addresses are recognizable as six groups of two hexadecimal digits, separated by hyphens, colons, or without a separator. Within the Open Systems Interconnection (OSI) network model, MAC addresses are used in the medium access control protocol sublayer of the data link layer. This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth. On a FreeBSD machine the command dmesg will display the MAC address, among other things.Label of a UMTS router with MAC addresses for LAN and WLAN modulesĪ media access control address ( MAC address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. Wired and wireless interface in your system. *You will need to register all MAC addresses in cases where you have both The 12-digit Physical Address is the same as MAC address

Type in ipconfig/all in the Command Prompt Windows. (click Start, then Run, then type cmd in the text If you have TCP/IP installed, run ipconfig/all from a Command Prompt window. In the case of this machine, it is 00:60:08:C4:99:AA. The MAC address is the HWaddr listed on the first line. TX packets:69559 errors:0 dropped:0 overruns:0 RX packets:15647904 errors:0 dropped:0 overruns:0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 For example:Įth0 Link encap:Ethernet HWaddr 00:60:08:C4:99:AA Then, type ifconfig -a and look up the relevant info. In order to find the MAC address of the ethernet device, you must first become root, through the use of su. On Linux systems, the ethernet device is typically called eth0. If assigned by the manufacturer, a MAC address usually encodes the manufacturer's registered identification number.

In computer networking, a Media Access Control address (MAC address), Ethernet Hardware Address (EHA), hardware address, adapter address or physical address is a quasi-unique identifier assigned to most network adapters or network interface cards (NICs) by the manufacturer for identification. What is my MAC address, how do i find the MAC address of my computer determine mac address from ip, find remote mac address - determine mac address from ip, mac address lookup, ping a mac address, find remote mac address, mac address network search, ping a mac address.