COMPUTER NETWORKING

DATA LINK LAYER WIRED NETWORKS

WIRED LANS ETHERNET PROTOCOL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What purpose does ARP serve?
A
translate URLs to IP addresses
B
resolve IPv4 addresses to MAC addresses
C
provide dynamic IP configuration to network devices
D
convert internal private addresses to external public addresses
Explanation: 

Detailed explanation-1: -ARP is necessary because the software address (IP address) of the host or computer connected to the network needs to be translated to a hardware address (MAC address). Without ARP, a host would not be able to figure out the hardware address of another host.

Detailed explanation-2: -ARP is the Address Resolution Protocol, used to translate between Layer 2 MAC addresses and Layer 3 IP addresses. ARP resolves IPs to MAC addresses by asking, “Who has IP address 192.168. 2.140, tell me.” An example of an ARP reply is “192.168. 2.140 is at 00:0c:29:69:19:66.”

Detailed explanation-3: -A device uses ARP to determine the destination MAC address of a local device when it knows its IPv4 address. ARP provides two basic functions: Resolving IPv4 addresses to MAC addresses. Maintaining an ARP table of IPv4 to MAC address mappings.

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