What is this symbol : called?

Match the following terms to their meanings:

I. A reduced image of a graphic A. Content pane II. Displays current folder contents B. folder structure III. Hierarchy of folders in Vista C. thumbnail IV. Mouse or touchpad D. scroll bar V. Dragging this moves the window up, down, left, or right E. pointing device

Which security type deliberately exposes a system's vulnerabilities or resources to an attacker?

A. Intrusion detection B. Firewalls C. Honeypots D. Intrusion prevention