hub, switch, router => connaitre les fonctions!!!
purpose of the access point

router => fonctionnement, algorithms...
need advantages desavanteges 

4)trans|				
3)net  |   router, switch
2)DATA |   bridge, switch		les 4: Gateway
1)PHYS |   reporter, modem, hub


modem (no need)

star topology 
physical: connectics, configuration
topology: the way data travel

gateway=> permet la corespondance entre differentes architectures
 SNA windows ou sna novell ou sna MAC...

Front end Porcessor

routing, link stay, vector=> how it is uses (works)
routing algorithm 
the 4 strategies (flow, dynamic, random.... avant dernier cours plus precisement fix flow)

wireless networks (be able to draw a diagramm) celullar system, implementation system (cellular abour frquency)
know src (don't need to know too much)