Why MAC Address is Unique for All Devices?
If a network has a topology of two or more devices with the same MAC address then the network will not work. This is very crucial when a number of large devices are connected together within a single organization.
Example:
In an Organization, there are 2 devices A and B are connected through a router or a switch. the MAC address of the devices should be 00000ABB98FC, and 00000ABB58FC, respectively.
A MAC address can be expressed in 3 general formats:
- Hyphen-hexadecimal Notation
- Colon-Hexadecimal Notation
- Period-Separated Hexadecimal Notation
What is MAC Address Table ?
MAC stands for Media Access Control it is a physical address that uniquely identifies a device and hardware manufacturer on a network. Most commonly used in (IEEE 802) networking technologies, like Ethernet, WiFi, and Bluetooth technology.
A mac address is globally unique so suppose two devices are on the internet they can not have the same MAC address. It works on the Data link layer of the OSI model. It is also known as the Ethernet address are 6 bytes or 48 bits in length typically written in hexadecimal format.
A MAC address is generally assigned to the Network Interface Card of each and every device that is connected to the internet.
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