This question is bugging me for a while and I am surprised to know people who ought to know these things dont actually know.
So my question is -
Why each interface on a router has an IP address. If we work around, we could devise a system where each router had only one IP address. Is there any historic reason for this? or is it demand of some 'scenario' ? If its because of some scenario, whats that scenario which neccessiates a router to have one IP each interface?
my Second question is - other than one IP for each interface, does a router also has a sepearte IP for itself as a device?
PLease answer it.
Thanks and regards.