You may be able to identify the IP addresses and machine names for the firewall, and the names of internal mail servers by:

Question

Options

• ASending a mail message to a valid address on the target network, and examining the header information
• BExamining the SMTP header information generated by using the -mx command parameter of DIG
• CExamining the SMTP header information generated in response to an e-mail message sent to an
• DSending a mail message to an invalid address on the target network, and examining the header

• A
  5% (3)
• B
  12% (7)
• C
  81% (47)
• D
  2% (1)

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