I passed my midterm today, so let me give it a try..
LAYER 7 - APPLICATION - Your data manipulation applications :)
LAYER 6 - PRESENTATION - compression, encryption, char translation
LAYER 5 - SESSION - your connection manager interface (i.e. BSD sockets)
LAYER 4 - TRANSPORT- data segmentation, with checksums
LAYER 3 - NETWORK - Addressing (i.e. routing, routers.. or i like "rooters")
LAYER 2 - DATALINK - Bit-oriented encapsulation frames
LAYER 1 - PHYSICAL - .,';,.ELECTRICAL SIGNALS.,';,.
Segments are LAYER 4. Packets are LAYER 3. Frames are, duh, LAYER 2.
Segments : also called PDUs, Protocol Data Units, a grouping of data gtom
layers
7,6, & 5 and provides reliability and error correction for transfer.
--chris
9/27/02 3:49:32 PM, "Bill Cunningham" <billcu(_at_)CITYNET(_dot_)NET> wrote:
Vint,
Some of us at IETF are thinking about a draft to clear up some
terminology about the different layers of TCP/IP.
Whether it be packet, datagram, segement (more clearly defined) or whatever
the case. Do you have any opinions on this?