A vulnerability scanner is a) a prepared application that takes advantage of a known weakness. b) a tool used to quickly check computers on a network for known weaknesses. c) an application that captures TCP/IP data packets, which can maliciously be used to capture passwords and other data while it is in transit either within the computer or over the network. d) a situation in which one person or program successfully masquerades as another by falsifying data and thereby gaining illegitimate access.

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