subnetting

[carl_townshend]

hi all, i have been reading my sybex ccna book, it says when i subnet that when i reach the same network as the value of the subnet mask it cannot be used, is this right ?

[farkascsgy]

I don't really understand you...

Maybe you mean that in case of subnetting there ara reserved addresses like: the first address of the subnet (subnet network address) and last address of the subnet (subnet broadcast address).

Ans also when you disable ip subnet-zero you can't use the full first and full last subnet.

10.1.0.0/24 it includes the following subnets 10.1.0.0 - 10.1.255.0 /24 case when ip subnet-zero is enabled all subnets can be used, but when it is disabled you can use just the following subnets: 10.1.1.0 - 10.1.254.0 /24

Regarding only one subnet: 10.1.50.0/24, you can use IP address between 10.1.50.1 - 10.1.50.254 for addressing host and 10.1.50.0 is the subnet network address and 10.1.50.255 is the subnet broadcast address.

Bye

FCS

Please rate me if I helped.