An engineer is performing the IP subnet design for an organization and needs to find the best mask that should be used. The organization has been assigned the 10.200.32.0/23 network. The addresses must be split up so that they can be equally organized into 16 subnets of at least 25 addresses. Which mask would best fit this requirement?

A) 255.255.255.224
B) 255.255.255.240
C) 255.255.255.248
D) None

A
Explanation: B) The 10.200.32.0/23 network provides up to 510 total host addresses. To split this equally into 16 different subnets of at least 25 addresses, the engineer can use the 255.255.255.224 (/27 ) mask.
10.200.32.0/27
10.200.32.32/27
10.200.32.64/27
10.200.32.96/27
10.200.32.128/27
10.200.32.160/27
10.200.32.192/27
10.200.32.224/27
10.200.33.0/27
10.200.33.32/27
10.200.33.64/27
10.200.33.96/27
10.200.33.128/27
10.200.33.160/27
10.200.33.192/27
10.200.33.224/27