What tool would you use to map the MAC address of an IP on a local network?

Study for the Internet Protocol Version 4 Test. Use flashcards and multiple-choice questions, each with hints and explanations. Master the exam with confidence!

Multiple Choice

What tool would you use to map the MAC address of an IP on a local network?

Explanation:
Mapping a MAC address to an IP on a local network is done with ARP. When a device needs to send an IPv4 packet to another device on the same LAN, it must know the destination’s MAC address to create the Ethernet frame. If the MAC isn’t known, it issues an ARP request—a broadcast asking, “Who has this IP? Tell me your MAC.” The device that owns that IP replies with its MAC address, and the requester stores this mapping in its ARP table for quick use next time. This is how hosts learn who to send frames to on the local segment. DNS, by contrast, translates hostnames to IP addresses, not MACs, and operates at a higher level. ICMP is used for diagnostic and control messages (like ping and error signaling), not for resolving hardware addresses. NTP is for time synchronization.

Mapping a MAC address to an IP on a local network is done with ARP. When a device needs to send an IPv4 packet to another device on the same LAN, it must know the destination’s MAC address to create the Ethernet frame. If the MAC isn’t known, it issues an ARP request—a broadcast asking, “Who has this IP? Tell me your MAC.” The device that owns that IP replies with its MAC address, and the requester stores this mapping in its ARP table for quick use next time. This is how hosts learn who to send frames to on the local segment.

DNS, by contrast, translates hostnames to IP addresses, not MACs, and operates at a higher level. ICMP is used for diagnostic and control messages (like ping and error signaling), not for resolving hardware addresses. NTP is for time synchronization.

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