Top 20 Interview Questions & Answers for Cisco Engineer Roles – 2025

Planning to pursue a career in Cisco engineering? Here’s a comprehensive list of questions and answers that will help you prepare for your interview and showcase your knowledge, skills, and experience in working with Cisco networking equipment. These questions cover a range of topics from basic networking concepts to advanced routing and switching protocols.

General Questions

• 1. What motivated you to become a Cisco engineer?
  I have always been interested in technology and how it connects people and businesses. Cisco’s reputation as a leader in networking and their innovative solutions inspired me to become a Cisco engineer.
• 2. How do you keep up with the latest networking trends and technologies?
  I regularly attend Cisco’s online training sessions and events, and I also follow industry publications and research papers to stay updated with the latest trends and technologies.
• 3. Can you walk us through a complex project you have worked on as a Cisco engineer?
  During my previous role, I was responsible for implementing a secure and scalable network for a medium-sized enterprise. I performed a thorough assessment of their existing infrastructure, designed a new network architecture, and successfully deployed it within the expected timeframe.
• 4. How do you handle conflicts with team members or clients?
  I believe open communication and active listening are essential in resolving conflicts. Whenever a conflict arises, I try to understand the root cause and work towards finding a mutually agreeable solution.
• 5. Tell us about a time when you had to quickly adapt to a new or unknown technology.
  In a recent project, we had to integrate an unfamiliar application into our network. I studied the documentation and reached out to experts in the field to quickly learn the technology and ensure a smooth integration.

Technical Skills & Experience

• 6. What is the difference between a router and a switch?
  Routers are used to connect multiple networks, while switches are used to connect devices within a network. Routers use logical addressing, such as IP addresses, to direct traffic, while switches use physical addressing, such as MAC addresses, to forward data packets.
• 7. How do you troubleshoot a network connectivity issue?
  I follow a systematic approach by first checking the physical connections, then ensuring the correct configuration of devices, and finally using network diagnostic tools to identify and resolve any issues.
• 8. Can you explain VLANs and how they are used in a network?
  VLANs (virtual LANs) are used to segment a network into smaller subnetworks to improve network performance, security, and manageability. They allow devices to communicate with each other within the same VLAN, but not with devices in other VLANs.
• 9. How do you secure a network against cyber threats?
  I implement a multi-layered approach that includes firewalls, access control lists, intrusion prevention systems, and regular security audits. I also stay updated with the latest security vulnerabilities and promptly patch them.
• 10. Can you explain the difference between OSPF and EIGRP?
  OSPF (Open Shortest Path First) is a link-state routing protocol, while EIGRP (Enhanced Interior Gateway Routing Protocol) is a hybrid routing protocol. OSPF supports variable-length subnet masks, while EIGRP only supports classless addressing. OSPF calculates the shortest path using Dijkstra's algorithm, while EIGRP uses the Diffusing Update Algorithm (DUAL).

Cultural Fit with Company Values

• 11. What do you know about our company's culture and values?
  From my research, I understand that the company values innovation, collaboration, and diversity. It also promotes a work-life balance and encourages employees to contribute to their communities.
• 12. How do you ensure your work aligns with the company’s objectives and values?
  I prioritize understanding the company's goals and values, and I align my work to support them. I also proactively seek feedback from my team and superiors to ensure I am on the right track.
• 13. How do you handle a difficult or challenging client?
  I believe in maintaining a positive attitude and keeping the lines of communication open with the client. I try to understand their concerns and come up with a solution that meets their needs while also aligning with the company's values.
• 14. How do you stay motivated and handle a high-pressure work environment?
  I prioritize my tasks and set realistic goals to stay focused and motivated. I also take breaks when needed and practice stress management techniques, such as exercise and mindfulness.
• 15. How do you contribute to a team’s success?
  I am a team player and believe in open communication and active collaboration. I continuously share my knowledge and expertise, seek feedback from team members, and offer support wherever needed.