![]() Because 1 byte equals 8 bits, we can also say that a MAC address is 6 bytes in length.įigure 7-8 The Ethernet MAC Address Structureįor example, say that Cisco needs to assign a unique MAC address to a new device, and the IEEE has assigned Cisco the OUI 00-60-2F. MAC addressing provides a method for device identification at the data link layer of the OSI model.Īn Ethernet MAC address is a 48-bit address expressed using 12 hexadecimal digits, as shown in Figure 7-7. ![]() The MAC address is used to identify the physical source and destination devices (NICs) on the local network segment. In an Ethernet LAN, every network device is connected to the same shared medium. If such conversions are required, convert the decimal or hexadecimal value to binary and then to convert the binary value to either decimal or hexadecimal as appropriate. You might have to convert between decimal and hexadecimal values. Hexadecimal may also be represented using a subscript 16 or by using the hex number followed by an H (for example, 73H). Hexadecimal numbers are often represented by a value preceded by 0x (for example, 0x73) to distinguish between decimal and hexadecimal values in documentation. For example, in Figure 7-6, the binary value 0000 1010 is shown to be 0A in hexadecimal. When using hexadecimal, leading zeros are always displayed to complete the 8-bit representation. ![]() The MAC address operates in the data link layer, while the IP address operates in the network layer.Figure 7-6 Selected Examples of Decimal to Binary to Hexadecimal Conversions The two addresses work in different level. Simply put, they are used to locate a device on the Internet. To be specific, MAC address is associated with the computer, while the IP address is related to the Internet used by the computer. MAC and IP addresses are vital to a computer network and Internet setup. MAC addresses are used for broadcasting, whereas IP addresses are used for broadcasting or multicasting. The MAC address defines the identity of the device, while the IP address describes how the device is connected to the network. Differently, the IP address is an address that helps you identify a network connection. MAC address is a unique hardware identification number, which is assigned to a NIC (Network Interface Controller/Card). MAC address is assigned by the manufacturer of the hardware interface, while the IP address is assigned by the network administrator or Internet Service Provider (ISP). MAC vs IP address: what’s the difference? Pay attention to the content below! You’ll find the difference between MAC address and IP address in the section below. Now, it’s time to discuss IP address vs MAC address.
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