Please define port scanning and describe some of the common techniques used when performing it.

"Port scanning is the technique used to identify open ports on a host within the network. Administrators use it to verify that their security policies are effective. Hackers also use this to try to penetrate the network. Techniques used to conduct port scanning include TCP connect, TCP half-open, ping scan, UDP, and stealth scanning."

Technical questions can come in a variety of different formats. A common one is to ask you to define a concept and describe how it is used in the job for which you are interviewing. Your response should start with the definition followed by the description of how it is used. You should also provide at least one example to demonstrate your familiarity with the concept in practice and your experience using it.