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Full Discussion: The OSI-model
Special Forums IP Networking The OSI-model Post 17837 by J.P on Wednesday 20th of March 2002 02:27:24 PM
Old 03-20-2002
The OSI-model

after reading a paper about the OSI-model I'm not exactly sure how to look at this model.

Does data (a file) travel from the application level "down" each layer at the client

Application
V
Presentation
V
Session
V
Transport
V
Network
V
Data link
V
|
|
| (Physical)
|
|
and "up" each layer (in reverse order: physical, data link, network etc..) at the server ?

After taking a look at a picture (http://www.cs.columbia.edu/~hgs/internet/it_stack.gif)
I noticed that there seems to be no data link activity between the
network (IPv4, IPv6) and physical layer (Ethernet)..

I couldn't be more confused. Any help at all is highly appreciated Smilie
 

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ADDLOMODEL(3)						       MBK LOGICAL FUNCTIONS						     ADDLOMODEL(3)

NAME
addlomodel - create a tempotary logical model and add it to a list ORIGIN
This software belongs to the ALLIANCE CAD SYSTEM developed by the ASIM team at LIP6 laboratory of Universite Pierre et Marie CURIE, in Paris, France. Web : http://asim.lip6.fr/recherche/alliance/ E-mail : alliance-users@asim.lip6.fr SYNOPSYS
#include "mlo.h" lofig_list *addlomodel(model, name) lofig_list *model; char *name; PARAMETERS
model Pointer to the head of a model list name Name of the model to be created DESCRIPTION
addlomodel creates a new lofig_list element and adds it to the front of the list pointed to by model, and becomes itself the list head. The addlomodel function is mosty used to create a temporary list of lofig in order to represent the "in file" instances' models. In fact, all the file format used with mbk have the notion of models local to files, so they are not figure, but are temporarly used to create instance connectors, for example. For details on the structure, see lofig(3). RETURN VALUE
addlomodel returns a pointer to the new head of model list. ERROR
"*** mbk error *** addlomodel impossible : model name already exists" The model, not the figure, is already present in the model list pointed to by model, and since a model should be unique, this can't be. EXAMPLE
#include "mut.h" #include "mlo.h" void add_model(name) char *name; { MODEL = addlomodel(MODEL, name); } SEE ALSO
mbk(1), lofig(3), getlomodel(3), freelomodel(3). BUG REPORT
This tool is under development at the ASIM department of the LIP6 laboratory. We need your feedback to improve documentation and tools. ASIM
/LIP6 October 1, 1997 ADDLOMODEL(3)
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