Are 175.100.255.18 and 142.226.0.15 valid?

d0cg0nz0

Are 175.100.255.18 and 142.226.0.15 valid? I dont think either is reserved. I know they are class B. The 255 in the network portion and the zero in the host portion look suspicious, but I am not able to find anything in my book.
Plz help

eurotrash

yep they look fine to me.

romain

These are correct but it depends on subnet mask too

msnelgrove

kinda ify on the first one...

sprkymrk

d0cg0nz0 wrote:

Are 175.100.255.18 and 142.226.0.15 valid? I dont think either is reserved. I know they are class B. The 255 in the network portion and the zero in the host portion look suspicious, but I am not able to find anything in my book.
Plz help

Off the top of my head I think the first one since it starts with a 175 would be a class B network. (Class B: 128.0.0.0 - 191.255.255.255). 175.100.0.0/16 = 175.100.0.0 through 175.100.255.255, so as long as it is truly a class B, and not subnetted in any way, 175.100.255.18 should be a good host address. The network address is 175.100.0.0 and the broadcast is 175.100.255.255.

The second address is fine too, for the same reasons (Class . Again, subnetting could make a difference. As niamor mentioned, the subnet mask will be the determining factor.