The address resolution protocol (ARP) is used for
2018
The address resolution protocol (ARP) is used for
Answer: D. finding the MAC address that corresponds to an IP address — In a network: IP address → identifies a device logically MAC address → identifies the actual hardware interface But data frames inside a LAN are delivered…
- A.
finding the IP address from DNS
- B.
finding the IP address of the default gateway
- C.
finding the IP address that corresponds to a MAC address
- D.
finding the MAC address that corresponds to an IP address
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Correct answer: D
In a network:
IP address → identifies a device logically
MAC address → identifies the actual hardware interface
But data frames inside a LAN are delivered using MAC addresses, not IP addresses.
So when a device wants to send data to another device in the same network:
It knows the IP address
It needs the MAC address
It sends an ARP request:
“Who has this IP address? Tell me your MAC address.”
The correct device replies with its MAC address