N10-005 Question #674: Real Exam Question with Answer & Explanation

The correct answer is D: Broadcast MAC address.. In Ethernet networking, the MAC address FF:FF:FF:FF:FF:FF (all binary 1s) is the reserved Layer 2 broadcast address. A frame sent to this address is delivered to all devices on the local network segment. It is used by protocols such as ARP (Address Resolution Protocol) when a dev

Question

Which of the following is described by the MAC address FF:FF:FF:FF:FF:FF?

Options

AUnicast MAC address.
BInvalid MAC address.
CMulticast MAC address.
DBroadcast MAC address.

Explanation

In Ethernet networking, the MAC address FF:FF:FF:FF:FF:FF (all binary 1s) is the reserved Layer 2 broadcast address. A frame sent to this address is delivered to all devices on the local network segment. It is used by protocols such as ARP (Address Resolution Protocol) when a device needs to discover the MAC address associated with a given IP address. A unicast MAC address (A) identifies a single, specific network interface. An invalid MAC address (B) is incorrect - this is a perfectly valid and purposefully defined address. A multicast MAC address (C) begins with 01:00:5E for IPv4 multicast and identifies a group of devices, not all devices.

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