Member Avatar for 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

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asked for bit‑level header/trailer formats for Internet transmissions. For precise, authoritative layouts the original protocol specifications and registries are the right place — they show exact bit offsets, field widths and option behavior. ’s pointer to general online sources was a useful start; the items below point to the canonical specs and a short, practical workflow to map those diagrams to real packets.

Practical workflow: capture full packets (do not truncate), open them in a packet dissector and compare the byte/bit view to the RFC diagrams. Example commands:

sudo tcpdump -i eth0 -s 0 -w capture.pcap
tshark -x -r capture.pcap

Useful tools: Wireshark user guide and tcpdump/libpcap. Notes: RFC header diagrams use bit offsets (0–31) and show network byte order (big‑endian); optional fields (IP options, TCP options, VLAN tags) change header length, so always capture with full snaplen and consult the specific RFC/standard for any extension. For deeper explanation, Stevens’ "TCP/IP Illustrated, Vol. 1" and Tanenbaum’s "Computer Networks" remain good complements to the RFCs.

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Member Avatar for Rashakil Fol

Wikipedia seems to have the bit-level details.

Member Avatar for Rbezona

Thank you very much.

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

Roger

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