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Home > Archive > CCNA > September 2003 > Broadcast
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| justindu 2003-09-16, 4:21 pm |
| Look at this example:
Visually, it is easy to see that to have 6 subnets, I will use 224 as a subnet bit and will start my first range at 32. I will then increment each range by that same value of 32. I love this chart!
My 6 ranges will be:
131.107.32.1 to 131.107.63.254
131.107.64.1 to 131.107.95.254
131.107.96.1 to 131.107.127.254
131.107.128.1 to 131.107.159.254
131.107.160.1 to 131.107.191.254
131.107.192.1 to 131.107.223.254
You cant assign the last IP to a host becuase it it used as the broadcast right?
So, 131.107.63.254 would be the broadcast and the last useable host would be 131.107.62.254 right? | |
| Demijohn 2003-09-16, 4:40 pm |
| NO.
131.107.63.255 would be the broadcast address, and 131.107.63.254 is the last usable address in the 131.107.32.0 subnet. | |
| martek 2003-09-16, 4:43 pm |
| For subnet 131.107.32.0 the broadcast address is 131.107.63.255 and the last valid address is 131.107.63.254.
Remember: the broadcast address is the last IP in the subnet, and the last valid IP is the broadcast address - 1. In this case 131.107.63.255 is the last IP in the 131.107.32.0 subnet cause if you add 1 to 131.107.63.255, you get 131.107.64.0, which is the next subnet ID.
I hope this helps.  | |
| justindu 2003-09-17, 12:03 am |
| Ok i think i got it...  |
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