IP addresses unify different physical addresses, hiding physical addresses, and upper software using IP address identifiers. However, two computers can only communicate when they know each other's physical address. IP packets are often sent via Ethernet. The Ethernet device does not recognize 32-bit IP addresses, which transmit the Ethernet packets with 48 MAC addresses. Therefore, the IP drive must convert the IP destination address to the Ethernet network destination address. There is a static or dynamic mapping between these two addresses, and it is usually necessary to look at a table for this mapping. The Address Resolution Protocol (ARP) is the Protocol used to determine these images. When ARP works, send a packet of Ethernet broadcast with the desired IP address. The destination host (or another system that represents the host) responds with a packet containing IP and Ethernet addresses. The sender caches the address at high speed to save unnecessary ARP communication

Packet : 913319645.rar filelist
5.Cpp

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