IP and TCP headers in details? What is the purpose of each field in the header

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IP and TCP headers explained with purpose of each field

IP header contains source and destination IP addresses, version, header length, type of service, total length, identification, flags, fragment offset, time to live, protocol, header checksum
TCP header contains source and destination port numbers, sequence number, acknowledgement number, data offset, reserved, flags, window size, checksum, urgent pointer
Purpose of each field in IP and TCP headers is to provide necessary information for proper routing and delivery of packets
For example, the source and destination IP addresses in the IP header help routers determine the path a packet should take to reach its destination
Similarly, the sequence and acknowledgement numbers in the TCP header help ensure reliable delivery of data

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