How ARP Works: Understanding ARP Requests, Replies, and ARP Cache Address Resolution Protocol (ARP)  is an essential protocol in the world of networking. It's responsible for mapping IP addresses to MAC addresses  within a local area network (LAN). ๐ How ARP Works When a host wants to communicate with another device, it needs the MAC address associated with the destination IP. If the MAC address is unknown, the host sends out a broadcast ARP Request  asking:  ๐จ️ “Who has IP address X.X.X.X? Tell me your MAC address.” The device with the matching IP sends an ARP Reply  with its MAC address, allowing communication to begin. ๐จ ARP Messages ARP uses two packet types:   ARP Request    Destination MAC: FF-FF-FF-FF-FF-FF  (broadcast)    Target MAC: 00-00-00-00-00-00  (unknown)      ARP Reply    Uses unicast MAC addresses  for both source and destination     Header Fields Include:   Source MAC and IP    Target MAC and IP   ๐งช Real-World Examples   Host-to-Host on Same Network  PC2 want...
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