What is correct about digital signatures?

• A.Digital signatures are issued once for each user and can be used everywhere until they expire.
• B.A digital signature cannot be moved from one signed document to another because it is the hash of the
  original document encrypted with the private key of the signing party.
• C.A digital signature cannot be moved from one signed document to another because it is a plain hash of
  the document content.
• D.Digital signatures may be used in different documents of the same type.

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An attacker with access to the inside network of a small company launches a successful STP manipulation attack. What will he do next?

• A.He will repeat the same attack against all L2 switches of the network.
• B.He will activate OSPF on the spoofed root bridge.
• C.He will repeat this action so that is escalates to a DoS attack.
• D.He will create a SPAN entry on the spoofed root bridge and redirect traffic to his computer.

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In many states sending spam is illegal. Thus, the spammers have techniques to try and ensure that no one
knows they sent the spam out to thousands of users at a time. Which of the following best describes what
spammers use to hide the origin of these types of e-mails?

• A.Mail relaying, which is a technique of bouncing e-mail from internal to external mails servers
  continuously.
• B.A blacklist of companies that have their mail server relays configured to be wide open.
• C.Tools that will reconfigure a mail server's relay component to send the e-mail back to the spammers
  occasionally.
• D.A blacklist of companies that have their mail server relays configured to allow traffic only to their
  specific domain name.

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You are doing an internal security audit and intend to find out what ports are open on all the servers. What is the best way to find out?

• A.Scan servers with Nmap
• B.Scan servers with MBSA
• C.Telnet to every port on each server
• D.Physically go to each server

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As an Ethical Hacker you are capturing traffic from your customer network with Wireshark and you need to find and verify just SMTP traffic. What command in Wireshark will help you to find this kind of traffic?

• A.request smtp 25
• B.tcp.port eq 25
• C.smtp port
• D.tcp.contains port 25

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