Figure 1 is an interactive activity that allows the learner to practice matching a description of an IP header field with its name. The fields in this activity are version, time to live, source IP address, destination IP address, differentiated services and protocol. Figure 2 is an interactive activity that allows the learner to practice matching a description of more IP header fields with their name. The fields in this activity are Internet header length, total length and header checksum.
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