Which three statements about MAC addresses are correct?
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Correct answer: To communicate on a network, a device must have a unique MAC address, A MAC address has two parts: the vendor identifier and the device identifier, An example MAC address is 0A:26:B8:D6:65:90.
Why this is the answer
A device needs a unique MAC address to communicate on a network, as it serves as a unique hardware identifier at Layer 2 (Data Link Layer). Duplicate MAC addresses can cause communication conflicts. A MAC address is composed of two parts: the Organizationally Unique Identifier (OUI), which identifies the vendor, and the device identifier, assigned by the vendor to ensure uniqueness. An example MAC address like 0A:26:B8:D6:65:90 correctly illustrates the hexadecimal format. The MAC address is not the same as an IP address, which operates at Layer 3 (Network Layer) and is logically assigned. MAC addresses are typically burned into the hardware and do not require manual configuration in IOS by an administrator. The network and host identifier concept applies to IP addresses, not MAC addresses.
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