IP Class Networks

[InlineFour]

class c, the most common ip addresses, supports up to 254 clients. do companies even utilize class a and b addresses?

 

[RebateMonger]

The whole concept of "classes" is not really that useful. In real life, everybody creates subnets to create smaller, more useful, network sizes. For instance, 10.0.0.0 is in the "Class A" address range, but when you combine it with a 255.255.255.0 net mask, you have a network with only 254 usable addresses.

 

[Genx87]

A business I used to work for had a class B network. Of course they had 65,000 employees world wide also.

 

[spidey07]

yes. all the time.

I normally us a single class A. 10.0.0.0/8

But for the most part class is irrelavent anymore. Using a single class A in the private IP range really helps with keeping things organized and structured even on the largest of networks.

For example...site A would be 10.10.0.0/16. Meaning you can reference the entire site that has 256 class C networks with a single route. Repeat as necessary for other large sites (greather than say 128 class C networks)

Keeps your routing tables stable which is a good thing.

You can see how this scales. Let's say you have 100 large sites that each have 128 or more class C networks. Their range would be 10.0.0.0/16 - 10.100.0.0/16.

For smaller networks you would not need an entire class B so you assign these to use the range 10.255.255.0/24 - 10.192.0.0/24

 

[InlineFour]

kinda a dumb question, what ip do most servers use? just curious.

 

[spidey07]

Originally posted by: InlineFour
kinda a dumb question, what ip do most servers use? just curious.

It depends on the network.

I'll also disagree that a class C is the most common. It's highly discouraged to use a class C on the internet.

 

[InlineFour]

Originally posted by: spidey07

Originally posted by: InlineFour
kinda a dumb question, what ip do most servers use? just curious.

It depends on the network.

I'll also disagree that a class C is the most common. It's highly discouraged to use a class C on the internet.

in a medium/small business sized network.

i meant local networks.