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*Do you know what MAC address is?

A MAC (Media Access Control) address is a unique hardware identifier assigned to a device’s network interface card (NIC). Unlike an IP address, which can change, a MAC address is permanently set by the manufacturer and remains constant.

It consists of 12 hexadecimal characters (for example, 00:1A:2B:3C:4D:5E) and follows a standardized format. The first six characters identify the manufacturer, while the last six uniquely distinguish the device.

Operating at the data link layer (Layer 2) of the OSI model, MAC addresses enable communication within local networks.

The MAC address is mainly used for the following:

Device Identification: Helps switches and routers recognize devices within a network.
Data Transmission: Ensures data is sent to the correct device using its MAC address.
Network Security: MAC filtering prevents unauthorized devices from connecting.
IP Assignment: DHCP servers use MAC addresses to allocate IPs.
Traffic Control: Firewalls and security tools filter data based on MAC addresses.
Device Tracking: Used for inventory, monitoring, and troubleshooting.
Direct Communication: Devices can exchange data via MAC addresses without IPs.

If you want to know more about this topic, make sure to read the following article about MAC address!