With classful addressing there are basically three classes of networks, a public or
private organization can request,for its hosts,a network of class A,B or C
with A being the largest followed by B and C.
I'm having an hard time understanding whether kor not this logic also applies to networks of routers.
Suppose routers X,Y and Z have an interface on the same LAN, in my understanding this LAN is also an IP network of class A,B or C, am I right?
What class should be required for such a network and in general for routers netoworks where there are only an handful of routers?
In this case even a class C network would be way too large and a many IP addresses would be wasted.
I'm only starting studying IP protocol,maybe I'm getting something wrong here.
I first want to learn how classful addressing works, and then go to CIDR.
The main reason I've asked this question is beacause I always read on textbooks
that the major drawbacks of classful addressing were:
- The fact that class A was too large for many organizations.
- Class B was just right but there were not many nets of this class.
- Class C nets were too small for many organizations.
Another important drawback was,in my opinion, the fact that many class C networks were in fact routers networks,so the number of class C networks available to organizations was further limited by this fact, am I right ?