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