IP Protocol and IPv4 Header Overview
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📌 IP Protocol and IPv4 Header Overview
IP is a protocol in the TCP/IP Internet layer that takes care of the transportation of IP datagrams (data packets) from one machine to another on a network. It uses a header packet that includes information to route and reconstruct the message. Each host must have a unique IP address to communicate on a network. IPv4 is the most commonly used IP address, while IPv6 addresses were designed to solve the IPv4 address exhaustion problem. Before sending an IP packet, a header is added that contains all necessary information for it to reach its destination. The header includes various fields such as the version, the length of the header, packet length, source address, destination address, protocol used, etc.