Start:

Ok The First Book Im going to study is

Development Routing TCP IP Volume 1, A book which every CCIE has admired so i will keep updating the POINTS, but tell u im very lazy :P

During Studies in 1st Chapter,i found some points interesting.

Functional Protocols: it Describes what something Does For example, "Request to Send" is the functional description of pin 4 of an EIA-232-D connector.

and
Procedural protocols describe how something is done. For example, a binary 1 is represented on an EIA-232-D lead as a voltage more negative than 3 volts.