Hi

I have a couple of questions regarding subnetting.

Lets say i have an IP address 123.233.4.34
Subnetting mask 255.255.255.4

Anyway my questions are how do i work out the following ? Without a Subnet calculator

1. subnet address for the given host IP address
2.Range host for the addresses for this subnet
3.broadcast address for this subnet
4.total number of useable subnets
5.number of valid host IP addresses per subnet
6.Subnetwork address with slash(/) mas for the assigned subnet
7.Default gateway (first useable subnet address)

thanks