Finding Usable IP Range's For Network Addresses

[kyle01]

I have a network address of 136.15.224.0/21 and I have 3 subnetworks (shown in picture). I know that 3 cannot be used for subnet's for I have to increment by 1 to make it 4. So that would make my CIDR /23. I have made a table with the network address, mask, usable IP range and Broadcasts. . This would be for the subnetworks themselves. As i only have 3 subnetworks, the last network address is unused.


In my first subnetwork I only have 1 router, which is fine.

But in my second subnetwork I have 4 router's and then 2 server's that all 4 router's connect to, then a main router that connects to the other 2 subnetworks routers.

When making the table with network addresses. would i have to split my network address into 8? or would i also have to change to 8 subnets instead of 4?

Thanks for any answers, and if you need anymore detail, please ask.

 

[MtnMan]

kyle, do your own homework.

 

[kyle01]

kyle, do your own homework.

could you just give a yes or no to whether it was right or not? this problem is blocking me from continuing and i've spent ages trying to research a solution

 

[Pandasaurus]

While this does sound an awful lot like a homework question, I could try to point you in the right direction without actually telling you the answer.

However, I'm also not entirely sure what the question is. Can you explain the problem a bit more clearly? What exactly do you need to accomplish?

 

[Gryz]

I have 3 subnetworks (shown in picture).

There is no picture here.
This makes me suspect that Kyle01 just copy&pasted the question from somewhere else. (E.g. his homework). He didn't even make the effort to proofread his own question.
This takes away all my willingness to even try to read the question and try to answer it.