At one point ________ was the largest and most popular social bookmarking site

A technician needs to install a new wireless encryption system. They are evaluating the feasibility of implementing WPA. WPA increases protection over WEP by implementing which of the following?

A. Strong RC4 encryption B. Shared secret keys C. AES encryption D. Key rotation

A ____ is a self-copying program that spreads by itself from one computer to another.

A. worm B. bug C. virus D. Trojan horse