Which three statements about MAC addresses are correct? (Choose three.)To communicate with other devices on a network, a network device must have a unique MAC address.Group of answer choicesThe MAC address is also referred to as the IP address.The MAC address of a device must be configured in the Cisco IOS CLI by a user with administrative privileges.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. An example of a MAC address is 0A:26:B8:D6:65:90.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.

The three correct statements about MAC addresses are:

1. To communicate with other devices on a network, a network device must have a unique MAC address. This is because MAC addresses are used to identify devices on a physical network.

2. 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. An example of a MAC address is 0A:26:B8:D6:65:90. This is known as the Organizationally Unique Identifier (OUI) and is assigned by the Institute of Electrical and Electronics Engineers (IEEE).

3. The MAC address is not referred to as the IP address. These are two different things. An IP address is used to identify a device on a network at the network layer, while a MAC address is used at the data link layer.

The statement that the MAC address of a device must be configured in the Cisco IOS CLI by a user with administrative privileges is incorrect. MAC addresses are burned into the hardware and cannot be changed.

The statement that 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 is also incorrect. This is a description of an IP address, not a MAC address.

The three correct statements about MAC addresses are:

1. To communicate with other devices on a network, a network device must have a unique MAC address. This is because MAC addresses are used to identify devices on a physical network. Each network interface card (NIC) has a unique MAC address that identifies it on the network.

2. 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. An example of a MAC address is 0A:26:B8:D6:65:90. The first half of a MAC address contains the ID number of the adapter manufacturer. These IDs are regulated by an Internet standards body. The second half of a MAC address represents the serial number assigned to the adapter by the manufacturer.

3. The MAC address is not referred to as the IP address. These are two separate things. An IP address is a software address that is network protocol dependent and can be dynamically changed. A MAC address is a hardware address that uniquely identifies each node of a network and is assigned by the manufacturer.

The statement that the MAC address of a device must be configured in the Cisco IOS CLI by a user with administrative privileges is incorrect. MAC addresses are hard-coded into a device's network card and cannot be changed.

The statement that 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 is also incorrect. The MAC address does not contain information about the network.