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What should a technician do if a customer's screen image is upside down?

A) Replace the backlight. B) Replace the gyroscope. C) Update the video driver. D) Change the screen orientation.

Typically serving as a platform for an application level or circuit level gateway, a ________ is a system identified by the firewall administrator as a critical strong point in the network's security.

Fill in the blank(s) with the appropriate word(s).