Two Class C Networks?

In Theory how would you subnet mask two class C networks together? Say you had like 300 people at four different sites. How could you combine the two addresses?

Thanks

Kn1ght the confused.

Are these addresses already set up?

Are they private?

How are the 4 sites connected?

The Addresses have been assigned. (this is all in theory I am suppose to draw a diagram, like the one Chris has on this site. VERY cool by the way)
Sites would be in different areas.

115 end users in site A
75 in site B
75 in site C
45 in site D

This is all in Theory, a project my boss gave me to work with. So I suppose I could say they are private or Not private. The four sites AREN'T connected, that is what I'm trying to do. Heh.

Chris or Sahirh might have some ideas, but I need to know what your situation is.

You said you have 2 class C networks but 4 sites that are not connected.

How are you going to connect them? I assume you want them all talking together.

It sounds like you already have 2 networks. Is this already working on 2 sites and you want to combine them and add 2 more? If this is the case, are the 2 sites that already have the addresses connected and talking to each other?

Are the networks you already have public or private? Do you have 2 Class C addresses that have been subnetted?

Do you have a diagram of how it is set up now and one on what the new situation is?

I have four imaginary areas that I need to subnet mask together.

I am not sure how I am going to connect them together, that is the main reason I'm here.

There are no networks, it is all theory. So I have nothing. My boss wants me to draw a diagram, so no I don't have one that is the whole point of this exersize. But I get confused with how I could use two class "c"s and make everyone talk to each other. It is all imaginary so whatever is easier public or private.

I hope this is all the info that you needed.

Thanks everyone for caring. I haven't been on this site long but I REALLY like how everything is explained. This is the first time I even found/used the forums. It looks really good. No one belittles people for not knowing. They just help them. Chris, Kewl site so what I have seen man!

Kn1ght

This is my confusion. Why 2 class C networks? Why not 4?

If you only have 2 class C, you won't be able to subnet them equally to handle the situation you want. Here is why:

To subnet a class C you need to "borrow" bits from the last octet to use for the network address. This will cut down the number of hosts you can use and you will lose a couple of hosts for each bit you borrow.

[code:1]
The total hosts on a non subnetted class C network is 254.

Last Octet.
Left side Right side #Networks #Hosts
1 bit - 1 1111111 0 0 Illegal
2 bits - 11 11111 2 62
3 bits - 111 11111 6 30
4 bits - 1111 1111 14 14
5 bits - 11111 111 30 6
6 bits - 111111 11 62 2
7 bits - 1111111 1 0 0 illegal
[/code:1]

The most amount of hosts you can have in any subnet (for a class C) is 62.

What you could do is take one of the address and NAT it to a class B address 172.

Now depending on how you are going to connect (t1, cable, dsl, etc), you could use VPN to set up 4 networks and have them talk to each other this way.