What is the function of a “MAC address”?
a) A unique identifier assigned to a network interface
b) A number used to encrypt data
c) A device that connects to the internet
d) A security protocol for networks
Answer:
a) A unique identifier assigned to a network interface
Explanation:
A MAC (Media Access Control) address is a unique identifier assigned to the network interface of a device, such as a computer, router, or smartphone. It is a hardware address that helps distinguish devices on a local network.
MAC addresses are assigned by the device’s manufacturer and are used at the data link layer (Layer 2) of the OSI model. Unlike IP addresses, which can change based on network configuration, MAC addresses are permanent and unique to each device.
MAC addresses play a crucial role in network communication, enabling devices to recognize and communicate with each other within a local area network (LAN).