________ is a malicious software program that obtains information from a user's computer without the user's knowledge or consent

A _____ is a valuable tool that enables a user to find information on the Web by specifying words or phrases known as keywords, which are related to a topic of interest.

A. cookie B. server C. Web portal D. search engine

A ____ is a network of computers in relatively close proximity, such as on the same floor or in the same building.

A. local area network B. wide area network C. metropolitan area network D. near area network