Help me find detailed technical formats

[Rbezona]

for Internet transmissions.
I would like some advice on a book or manual which gives the
detailed format of header and trailer information sent to identify
network and Internet transmisions.

I have been been looking on the web awhile and find only high
level information not down to the bit details.

Thanks
Roger

[Rashakil Fol]

Wikipedia seems to have the bit-level details.

[Rbezona]

Thank you very much.

I spent hours searching for books and never once thought of
Wikipedia, a true wealth of free information.

Roger