A portable computer that runs Windows 8 uses a mobile broadband connection for the
corporate wireless network. The computer also has a wired corporate network connection.
The computer successfully downloads Windows updates when connected to either
network.
You need to ensure that the computer automatically downloads updates by using Windows
Update only while connected to the wired corporate network connection.
What should you do?

A.
Set the corporate wireless network to metered.

B.
Set the corporate wireless network to non-metered.

C.
Configure the Specify intranet Microsoft update service location local Group Policy
setting.

D.
Configure a Windows Firewall connection security rule.

Explanation:
http://www.eightforums.com/tutorials/5371 -wireless-network-set-unset-meteredconnectionwindows-8-a.html
http://www.windowsnetworking.com/articles_tutorials/Using-Wireless-NetworksWindows8.html
To help you gauge the amount of data usage on networks, Windows 8 includes a new data
usage tracking and metering feature. This is especially useful when using mobile broadband
networks, as your service likely has a limit to the amount of data you can use before you’re
charged overage fees or the speed is throttled, or maybe you’re even on a pay-as-you-go
plan that charges per usage. By default, Windows 8 tracks the amount of data you transfer
over Wi-Fi and mobile broadband networks. The running total (in MBs or GBs) and the time
or day since it’s been tracked is displayed when you click (or tap) on a network name from
the new network list, as shown in the figure below:

You can also set particular networks as a metered connection, which will then disable
Windows Update from downloading updates (except for critical security patches) and
possibly disable or reduce data usage from other Microsoft and non-Microsoft applications
as well.