20th February 2009 at 15:02
#55802
Pix
Guest
The protocol stacks are (good luck in redrawing them “horizontally” ):
– BSC
SMS−CB
X.25
XOT
TCP/UDP
IP
Link(802.3)
– IP/X25 Router
X.25 —————— X.25
XOT —————— LAPB
TCP/UDP ————— SERIAL LINK
IP
Link(802.3)
– CBC
SMS−CB
X.25
LAPB