On an Ethernet network, ARP packets are classified into ARP Request packets and ARP Response packets. In the initial communication phase, how are ARP Request packets transmitted on the network?

Question

Options

• AAnycast
• BUnicast
• CMulticast
• DBroadcast

• A
  15% (7)
• B
  8% (4)
• C
  4% (2)
• D
  73% (35)

Explanation

The Address Resolution Protocol (ARP) is used to map IP addresses to MAC addresses in a local network. ARP operates at the data link layer (Layer 2) of the OSI model and is essential for communication within a LAN. When a device needs to communicate with another device on the same network but does not know the destination's MAC address, it sends an ARP Request. Since the sender does not know the MAC address of the destination, it cannot send the request directly to the destination using unicast. Instead, the ARP Request is sent as a broadcast packet to all devices on the local network. The broadcast packet has a destination MAC address of FF:FF:FF:FF:FF:FF, which ensures that all devices on the network receive the packet. The device with the matching IP address responds with an ARP Reply, which is sent as a unicast packet back to the requesting device.

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