The item marked 6 in the accompanying figure is the ____.

Security testers and hackers use which of the following to determine the services running on a host and the vulnerabilities associated with these services?

a. Zone transfers b. Zone scanning c. Encryption algorithms d. Port scanning

Emily accidentally created a new user account on the wrong server. Which of the following commands could she use to delete the account she created?

a. deluser b. userdel c. usermod -r d. usermod -d