Which of the following types of social engineering attacks can be prevented by the destruction of documents with personal or sensitive information?

Some of a company's computers were manually configured to bypass the DNS servers for connections to a connections to a fileshare server. A technician needs to ensure at the computers use DNS to reach resources on the network. Which of the following should the technician do to confirm all the computers use only DNS?

A small office calls a technician to investigate some "invalid certificate" errors from a concerned user. The technician observes that whenever the user to access a secure website from the Windows desktop, this error is encountered. No other users in the office are experiencing this error. Which of the following should the technician do NEXT? (Choose two.)

A Linux user wants to use the grep command to identify every file name in the current directory that contains the word "mandatory." Which of the following commands would BEST accomplish this?

A help desk technician needs to make administrative changes securely on a remote user's machine. The user must be logged off when the changes are made.
Which of the following tools would the technician MOST likely use?