What are common signs that a system has been compromised or hacked? (Choose three.)

An attacker uses a communication channel within an operating system that is neither designed nor intended to transfer information. What is the name of the communications channel?

A security analyst is performing an audit on the network to determine if there are any deviations from the security policies in place. The analyst discovers that a user from the IT department had a dial-out modem installed. Which security policy must the security analyst check to see if dial-out modems are allowed?

Which of the following techniques can be used to mitigate the risk of an on-site attacker from connecting to an unused network port and gaining full access to the network? (Choose three.)

What type of port scan is shown below?