Refer to the exhibit. A packet sourced from 172.16.32.254 is destined for 172.16.32.8. What is the subnet mask of the preferred destination route?

The subnet mask 255.255.224.0 (/19) represents a larger network and is less specific than 255.255.255.192, so it would not be the preferred route based on longest prefix match if a more specific route exists.

The subnet mask 255.255.255.0 (/24) also contains 172.16.32.8, but it is less specific than 255.255.255.192 and thus would not be the preferred route if a /26 route is available.

The destination IP address 172.16.32.8 falls within the 172.16.32.0/26 subnet (172.16.32.0 - 172.16.32.63), which uses the subnet mask 255.255.255.192. This is the most specific subnet mask provided that contains the destination IP address as a usable host, representing the longest prefix match for routing.

The subnet mask 255.255.255.252 (/30) would define 172.16.32.8 as a network address (e.g., 172.16.32.8/30), meaning 172.16.32.8 itself would not be a usable host address.