Which numbered item indicates a drop-down list box in the accompanying figure?

How do you insert a separator bar into a menu?

a. Type a hyphen (?) as a menu item’s Text property. b. Type a space as a menu item’s Text property c. Assign True to the Separator property d. Right-click an existing item and select Bar from the pop-up menu

A(n) __________ is any device that prevents a specific type of information from moving between an untrusted network and a trusted network.

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