Whenever a Cisco interviewer asks for your opinion, you are free to provide an answer relevant to your experience and knowledge. However, your answer to this question should align with how the organization you are interviewing with uses the concept, process, or item they are asking about. You can ensure that your answers align with Cisco's needs by researching the job, the company, and possibly even the interviewer before the interview. Sources for information about these topics include the company's website, the job description, and speaking with current and former employees.