Bit
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... A number of items have changed (for the better) from the original IP
specification. Bit-masks, where present have been converted into
human-readable values. IP addresses ...
... A number of items have changed from the original TCP specification.
Bit-masks, where present have been converted into human-readable
values. Length and checksum ...
... A number of items have changed from the original UDP specification.
Bit-masks, where present have been converted into human-readable
values. Length and checksum ...
... ELEMENT offset EMPTY>
<!-- 0 <= offset <= 8192 measured in 8 octet (64-bit) chunks -->
<!ATTLIST offset
value %Digits; #REQUIRED>
...