A ________ attempts to determine which e-mail addresses are valid on a network and then sends ...

A ________ attempts to determine which e-mail addresses are valid on a network and then sends messages to all of those combinations.
 
  A) directory harvest attack B) fraud
  C) hoax D) worm

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Match the following parts of an e-mail to their meaning:
 
  I. subject line
  II. signature block
  III. salutation
  IV. closing
  V. body
 
  A. single-spaced paragraphs that are brief and relevant
  B. a courteous recognition with which you begin a message
  C. sender's name and contact information
  D. short description of the content of the e-mail message
  E. should match the beginning of the message