One of the key functions network consulting engineers perform is to ensure that the company's network is kept secure and always available to authorized users. This requires network consulting engineers to be familiar with various threats hackers use to penetrate the network or shut it down. Interviewers will ask you about your knowledge of these threats to confirm that you know how to either prevent or remediate them. Since these threats are continually evolving, you may also be asked how you maintain your knowledge of these and stay on top of new ways hackers can infiltrate a network.