Slide 7 of 41
Notes:
A very important development in encoding technology was the introduction of a fairly formalised structure in which each message had an identification field and a length field, followed by arbitrary many so-called parameter values.
(This was used in IPv4 in the OPTIONS field.)
As you will see in the slide, the idea of an ID, a length field, and contents (parameters for the message) carried through to the parameters themselves, each having an ID, a length, and a value.
This approach provides a simple structure, but can be more verbose than the “bits and bytes” approach
