Are 175.100.255.18 and 142.226.0.15 valid?

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

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Comments

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.