Which protocol is commonly used for addressing resolution in local area networks?

Which protocol is commonly used for addressing resolution in local area networks?

• A. DHCP
• B. ICMP
• C. ARP
• D. HTTP

Answer: (C)

Address Resolution Protocol (ARP) is specifically designed to map IP addresses to MAC (Media Access Control) addresses, which are crucial for communication within local area networks (LANs). When a device wants to communicate with another device on the same LAN and knows only the IP address, it uses ARP to find the corresponding MAC address. In a typical scenario, if a computer wants to send data to another computer on the local network, it first checks its ARP cache to see if it has already resolved the IP address to a MAC address. If it doesn’t have the information cached, it broadcasts an ARP request on the network, asking "Who has this IP address?" The device that owns the IP address responds with its MAC address, allowing the sender to format and send the appropriate Ethernet frames to the correct hardware address. Other protocols, while integral to networking, serve different purposes. DHCP (Dynamic Host Configuration Protocol) is used for automatically assigning IP addresses and other network configuration parameters to devices on a network. ICMP (Internet Control Message Protocol) is primarily used for error messaging and diagnostics in IP networking, such as with the ping command. HTTP (HyperText Transfer Protocol) is the foundation of data communication for the World Wide Web, facilitating

Address Resolution Protocol (ARP) is specifically designed to map IP addresses to MAC (Media Access Control) addresses, which are crucial for communication within local area networks (LANs). When a device wants to communicate with another device on the same LAN and knows only the IP address, it uses ARP to find the corresponding MAC address.

In a typical scenario, if a computer wants to send data to another computer on the local network, it first checks its ARP cache to see if it has already resolved the IP address to a MAC address. If it doesn’t have the information cached, it broadcasts an ARP request on the network, asking "Who has this IP address?" The device that owns the IP address responds with its MAC address, allowing the sender to format and send the appropriate Ethernet frames to the correct hardware address.

Other protocols, while integral to networking, serve different purposes. DHCP (Dynamic Host Configuration Protocol) is used for automatically assigning IP addresses and other network configuration parameters to devices on a network. ICMP (Internet Control Message Protocol) is primarily used for error messaging and diagnostics in IP networking, such as with the ping command. HTTP (HyperText Transfer Protocol) is the foundation of data communication for the World Wide Web, facilitating