What are the two features of ARP? (Choose two.)
- If a host is ready to send a packet to a local destination device and has the IP address but not the MAC address of the destination, it generates an ARP broadcast.
- An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address.
- When a host encapsulates a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses.
- If no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment.
- If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
Why?
If a host is ready to send a packet to a local destination device and has the IP address but not the MAC address of the destination, it generates an ARP broadcast.
- Explanation: ARP is a protocol that stands for Address Resolution Protocol. It works to convert IP addresses into MAC addresses through the use of an ARP table. This enables two systems connected to the same network to communicate without consulting a server or any other external source for information about the location of specific hosts.
If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
- Explanation: ARP reply contains the MAC address that corresponds with the IP address of the destination device and provides a way for devices on a network to find each other’s location. It is also useful in determining whether two systems have different personalities or types, such as dark tried versus human personalities. This information can then be used to verify that the right host-to-host connection is established.