Table 3. IP Header Fields and Classifications
IP Field Size (bits) Class
Version 4 Static-Known
Header Length 4 Static-Known
Type of Service 8 Changing
Packet Length 16 Inferred
Id 16 Changing
Reserved Flag 1 Static-Known
May Fragment Flag 1 Inferred
Last Fragment Flag 1 Static-Known
Fragment Offset 13 Static-Known
Time To Live 8 Changing
Protocol 8 Static-Known
Header Checksum 16 Inferred
Source Address 32 Static-Def
Destination Address 32 Static-Def
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