|
Class |
Range |
Formula |
Default Mask |
|
A |
0-127 |
N.H.H.H |
255.0.0.0 |
|
B |
128-191 |
N.N.H.H |
255.255.0.0 |
|
C |
192-223 |
N.N.N.H |
255.255.255.0 |
1. Determine the Class of an address.
2. Determine How many bits you must borrow (if
applicable).
3. Determine the possible and usable nuber of subnets.
2(B) – 2 = Usable Subnets
4. Determine the possible and usable number of hosts.
2(U) – 2 = Usable Hosts
5. Determine the Default Mask.
6. Determine the Subnet Mask
7. Determine the increment. (Increment = Possible Number of Hosts)
8.
Determine the Network and
broadcast address for each subnetwork.