The words contained in this file might help you see if this file matches what you are looking for:

...Layering q can you give a brief overview of the layers model sure page has good summary what each layer does different models is difference between in text which physical network interface internet transport and application osi tcp ip implemented general theoretical protocols are use were proposed but never caught on globally by individuals or small groups then became standards designed committees yucky my term iso happened to did adopt if not why open systems interconnection european org that defined x asn tp etc most so complex untested they abandoned ruled still referred literature where protocol information specified bodies ietf get definitions searching for rfcs multiplexing demux exactly demultiplexing p allows from multiple sources be combined transmission across shared medium opposite taking things share resource splitting them out according some criteria...