Class A ip with subnet mask 255.255.255.0 possible?

[threedim]

I read this in a CCNA book

if i have a class A ip 10.88.88.3
and subnet mask: 255.255.255.0

it says it with the subnet mask the the machine with that ip will not work on the network. from the book it says class A ip's should have subnet masks of the form 255.xxx.xxx.xxx.

If I were to use that IP address with the above subnet mask on my LAN, wouldn't it still work?

 

[techthug]

Yes, It would give you a lot of networks/subnets with 254 host addresses. The Class A address default subnet is 255.0.0.0 but it could use 255.255.0.0 or 255.255.255.0. It all depends on how many networks you want and how many hosts you need. This is called subnetting see

http://www.learntosubnet.com

it will help.

 

[threedim]

thanks for clearing that up, the link is very useful too