Question related to Subnetting

o1n

Does the below IP network 192.168.0.0/3 or 10.0.0.0/2 valid or invalid scheme?

Thanks in advance!

instant000

Invalid. Why? You can't subnet a Class A with a mask less than /8. You can't subnet a Class C with a mask less than /24.

Hope this helps.

o1n

During I read the book 'Sybex CCNA study Guide', I found that for Class A network, subnetting from /8 . For Class B address, the subnetting from /16

So I think for Class A address /3 is invalid.

rob_crossley

You're right you cannot have a subnet mask for a class A address less than /8