1. This is a class C IP address, therefore 255 hosts can be supported (196.128.220.1 through 196.128.220.255). Note that 196.128.220.0 is not a valid host address because it represents the address of the network.
2. With a subnet mask of 255.255.255.240, 15 subnets can be supported because the first 4 bits of the last octet are used to represent the subnet addresses:
|
Last octet of IP
address |
Subnet IP address |
|
00010000 |
196.128.220.16 |
|
00100000 |
196.128.220.32 |
|
00110000 |
196.128.220.48 |
|
01000000 |
196.128.220.64 |
|
01010000 |
196.128.220.80 |
|
01100000 |
196.128.220.96 |
|
01110000 |
196.128.220.112 |
|
10000000 |
196.128.220.128 |
|
10010000 |
196.128.220.144 |
|
10100000 |
196.128.220.160 |
|
10110000 |
196.128.220.176 |
|
11000000 |
196.128.220.192 |
|
11010000 |
196.128.220.208 |
|
11100000 |
196.128.220.224 |
|
11110000 |
196.128.220.240 |