Which three statements about MAC addresses are correct? (Choose three.)
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A. B. C. D. E. F.ADE
A. To communicate with other devices on a network, a network device must have a unique MAC address: This statement is correct. Each device on a network must have a unique MAC address assigned to it, which is used to identify the device on the network.
B. The MAC address is also referred to as the IP address: This statement is incorrect. The MAC address and the IP address are two different addresses used for different purposes. The MAC address is used to identify the hardware device on the network, while the IP address is used to identify the logical location of the device on the network.
C. The MAC address of a device must be configured in the Cisco IOS CLI by a user with administrative privileges: This statement is incorrect. The MAC address is a unique identifier that is burned into the network interface card (NIC) of the device by the manufacturer, and cannot be configured or changed by a user.
D. A MAC address contains two main components, the first of which identifies the manufacturer of the hardware and the second of which uniquely identifies the hardware: This statement is correct. A MAC address is a 48-bit address, with the first 24 bits identifying the manufacturer of the hardware and the remaining 24 bits uniquely identifying the hardware device.
E. An example of a MAC address is 0A:26:B8:D6:65:90: This statement is correct. This is an example of a MAC address, which is written as six pairs of hexadecimal digits separated by colons.
F. A MAC address contains two main components, the first of which identifies the network on which the host resides and the second of which uniquely identifies the host on the network: This statement is incorrect. The MAC address does not contain any information about the network on which the device resides. It only identifies the hardware device on the network. The network information is determined by the IP address.