Which service, tool or command provides information about administrators, domain name servers, additional domains and physical locations?

Which type of device communicates with external servers on behalf of internal clients?

Which single service can you disable to stop approximately two-thirds of the exploration tools used against Windows NT/2000?

When assessing the risk to a machine or network, what step should you take first?
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Your company has suffered several denial-of-service attacks involving Microsoft Outlook e-mail clients. How can you protect your systems from such attacks in the future, yet still allows client users to accomplish their jobs?

Helga’s web server is placed behind her corporate firewall. Currently, her firewall allows only VPN connections from other remote clients and networks. She wants to open the internet-facing interface on her firewall so that it allows all users on the Internet to access her web server. Which of the following must Helga’s rule contain?

What is the most secure policy for a firewall?
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Which of the following do hackers target because it usually communicates in cleartext, and because it often carries sensitive information?

What can a hacker destroy or modify to make a server or network intrusion undetectable?