70-685 MCITP Question

Im having trouble understanding this question on the Test exam. Anyone care to explain?

All client computers on your company network run Windows 7. A computer is unable to connect to network resources. The configuration of the computer is as shown in the following table.

IP address 131.107.4.254
Subnet mask 255.255.240.0
Default gateway 131.107.15.255
Preferred DNS server 131.107.3.2

You need to ensure that the computer is able to connect to network resources.

What should you do?

A. Change the IP address to 131.107.3.254.
B. Change the subnet mask to 255.255.248.0.
C. Change the default gateway to 131.107.0.1.
D. Change the preferred DNS server to 131.107.3.1.

Oh, and the Answer is C.

This is an old thread, but I'll answer it anyway. The answer is C because the default gateway is currently configured (incorrectly) to be the broadcast address for that subnet. That means the client can't get out to any network resources. It's sending it's requests as a broadcast to its fellow clients instead of the true gateway, which would usually be the .1 address in this subnet configuration.