I am studying for CCNA. I have 2 questions about IP subnetting and broadcast subnet.
One, if you use the /25 mask for an address and it gives you 2 subnets according to the rule of # of bits ^2 -2 you would have 2 unusable subnets. My subnets calculators do not seem to indicate they are unusable. OK, so some say using the zero subnet is fine in real world. so that would leave me with one in a real world scenario. How's this dealt with on the CCNA test?
Second question is what the heck is a broadcast subnet? I keep reading that it is when all the subnet bits are 1s. But that doesn't tell me what it does or what is being broadcast. What is it and can I use it in real-world scenarios for hosts and how is that treated on CCNA test?
Marc in WA