A MAC (Media Access Control) address, sometimes referred to as a hardware address or physical address, is an ID code that's assigned to a network adapter or any device with built-in networking capability, such as a printer. While an IP address can potentially be assigned to any device, a MAC address is 'burned into' a given device from the factory. A media access control address (MAC address) of a device is a unique identifier assigned to a network interface controller (NIC) for communications at the data link layer of a network segment. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and Wi-Fi. A MAC address also known as a media access control address is a unique 48 bit number identifier assigned to network interfaces. Every piece of hardware with a ethernet, bluetooth or wireless interface has this unique 48 bit number to identify it. It is also used in other types of technologies but we are not going to cover them here. The Media Access Control (MAC) address is a binary number used to uniquely identify computer network adapters. These numbers (sometimes called hardware addresses or physical addresses ) are embedded into the network hardware during the manufacturing process, or stored in firmware, and designed to not be modified.
MAC may refer to any of the following:
1. Short for medium access control, or MAC address. Known as a physical address and hardware address whose number is uniquely formatted in hexadecimal format and given to each computer or network device on a computer network. The addresses are usually assigned by the hardware manufacturer, and these ID's are considered burned into the firmware of the network access hardware. Because of this process, some vendors use their own specific code in the hardware address. Download Scooby doo movie download in hindi. mac update 10.14.4. Below is an example of a MAC address.
D4-BE-D9-8D-46-9A
Because a MAC address is a unique address, a computer network will not have the same MAC address assigned to more than one computer or network device.
What Is Iphone Mac Address Used ForRelated pages
2. A Mac is also an abbreviation used to describe Macintosh; a line of personal computers created by Apple.
Related pages
Apple terms, Computer acronyms, Hardware terms, Hexadecimal, Hostid, Network terms, Physical address
A broadcast address is a network address at which all devices connected to a multiple-access communications network are enabled to receive datagrams. A message sent to a broadcast address may be received by all network-attached hosts.
In contrast, a multicast address is used to address a specific group of devices and a unicast address is used to address a single device.
For network layer communications, a broadcast address may be an IP address. In Ethernet networks, it can be a MAC address.
IP networking[edit]What Is The Mac Address Used For Ipv4 Multicast
In Internet Protocol version 4 (IPv4) networks, broadcast addresses are special values in the host-identification part of an IP address.[1] The all-ones value was established as the standard broadcast address for networks that support broadcast.[1] This method of using the all-ones address was first proposed by R. Gurwitz and R. Hinden in 1982.[2] The later introduction of subnets and Classless Inter-Domain Routing changed this slightly, so that the all-ones host address of each subnet is that subnet's broadcast address.[3][4]
As shown in the example in the table below, the broadcast address for an IPv4 host can be obtained by taking the bit complement (bitwise NOT) of the subnet mask and then performing a bitwise OR operation with the host's IP address. In short, take the host's IP address and set to '1' any bit positions which hold a '0' in the subnet mask. For example, for broadcasting a packet to an entire IPv4 subnet using the private IP address space 172.16.0.0/12, which has the subnet mask 255.240.0.0 (again, refer to the table below to see how this is obtained), the broadcast address is 172.16.0.0 bitwise ORed with 0.15.255.255 = 172.31.255.255.
A special definition exists for the IP address 255.255.255.255. It is the broadcast address of the zero network or 0.0.0.0, which in Internet Protocol standards stands for this network, i.e. the local network. Transmission to this address is limited by definition, in that it is never forwarded by the routers connecting the local network to other networks.
What Can A Mac Address Be Used For
IP broadcasts are used by BOOTP and DHCP clients to find and send requests to their respective servers.
Internet Protocol version 6 (IPv6) does not implement this method of broadcast, and therefore does not define broadcast addresses. Europa universalis iv download mac. Instead, IPv6 uses multicast addressing to the all-hosts multicast group. No IPv6 protocols are defined to use the all-hosts address, though; instead, they send and receive on particular link-local multicast addresses. This results in higher efficiency, because network hosts can filter traffic based on multicast address and do not need to process all broadcasts or all-hosts multicasts.
Ethernet[edit]
Broadcast is possible also on the underlying data link layer in Ethernet networks. Frames are addressed to reach every computer on a given LAN segment if they are addressed to MAC addressFF:FF:FF:FF:FF:FF. Ethernet frames that contain IP broadcast packages are usually sent to this address.
Ethernet broadcasts are used by Address Resolution Protocol and Neighbor Discovery Protocol to translate IP addresses to MAC addresses.
IPX networking[edit]
Internetwork Packet Exchange (IPX) allows broadcast. A packet with network number of FFFFFFFF is sent to all networks available. When the node number is specified as FFFFFFFFFFFF, the packet is intended to be received by all hosts in the network.
AppleTalk[edit]
The AppleTalk protocol allows broadcast. When the node ID is specified as 255, a packet is sent to all networks available.
See also[edit]
References[edit]What Is A Mac Address Used For On A Computer
Example Of A Mac Address
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