However, two network interfaces connected to two different networks can share the same MAC address.Īddress details The structure of a 48-bit MAC address. Network nodes with multiple network interfaces, such as routers and multilayer switches, must have a unique MAC address for each network interface in the same network. MAC addresses are formed according to the principles of two numbering spaces based on extended unique identifiers (EUIs) 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 addresses. Each address can be stored in the interface hardware, such as its 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. Label of a UMTS router with MAC addresses for LAN and WLAN modulesĪ MAC address (short for medium access control address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. There are several reasons why you might need to perform a URL to IP lookup, including network troubleshooting, security, content delivery, and testing.Not to be confused with Mac Address (YouTube channel). The URL to IP lookup is the process of mapping a domain name to its corresponding IP address, and it is necessary because computers communicate using IP addresses. Testing: URL to IP lookup can be useful for testing purposes, such as verifying that a website is properly configured and accessible from different locations.For example, you can use URL to IP lookup to determine the geographic location of a server hosting a website, so you can direct users to a server that is closest to them for faster access to the website. Content delivery: URL to IP lookup can help you determine the location of a server, which can be important for content delivery purposes. For example, you can use a URL to IP lookup to check the IP addresses of servers hosting email, VPN, or other sensitive services to ensure that they are legitimate and not part of a malicious network.
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