IP Packet Format

An IP packet consists of an IP header, sender and receiver IP addresses, followed by data. The maximum size of each IP packet is 64 KB. The IP header contains more information about the data packet, e.g. total length, whether the packet uses TCP or UDP, time-to-live (TTL) count, check-sum for error detection, etc. Figure 13.3 shows the IP header format.

Fig. 13.3 IP header format

Source: Wang K.C. (2018), Systems Programming in Unix/Linux, Springer; 1st ed. 2018 edition.

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