Another Question

[kouloubj]

I have run into another question that I am having some problems with....

You have been assigned the CIDR block of 111.31.4.0 /22 for your public network. Which IP addresses can be used on it public network? (choose 3)
a. 111.31.8.32
b. 111.31.7.64
c. 111.31.12.128
d. 111.31.6.255
e. 111.31.5.128
f. 111.31.3.255

I keep coming up with more than three valid answers???? Exam key has B, D & E.

Thanks Again!

 

[lgarner]

With a /22 mask, your third octet can be:
00000100 (4)
00000101 (5)
00000110 (6)
00000111 (7)

So, B, D and E are valid.