What are the differences between vulnerability assessment and penetration testing?

"Vulnerability assessment is the process used to identify and address flaws in the network security protocol. Penetration testing is the act of attempting to access the network as an unauthorized user. Every network is assumed to have vulnerabilities. By first assessing these, and then testing your assumptions, you will be able to address the vulnerabilities and prevent unauthorized users from accessing the network."

Often during an interview, you will be asked to compare two different technical concepts. The best way to do this is to define each concept first and then discuss the differences between them. You may also want to provide the interviewer with examples of how the concepts are used when performing your job. Keeping your answer brief and to the point will encourage the interviewer to ask a follow-up question. This allows you to elaborate on your knowledge of the concepts and demonstrate your qualifications for the job.