1-if I understand FR means there is a a hub and spokes topolgy. Correct?
2- when configuring FR, usually from the HUB , if the configuration is ethernet, it defaults to non-broadcast. Correct? in this case can we configure sub-interfaces for a physical ethernet interface? or sub-interfaces apply only to serial interfaces?
3- when configuring IP OSPF network on interface,
as I mentionned on point 1.
-if it's serial int it will default to NBMA
-if it's ethernet it will default to Broadcast
but if we select point to multipoint, it will also give us extra option to make it NBMA or Broadcast.
any one to clear this up?
4 I also want to know which one is commonly used nowadays FR or MPLS? and the reason?