Interview Questions for Network Engineer Position

1. What is the OSI model, and why is it essential in networking?
2. Explain the difference between TCP and UDP protocols.
3. How does ARP work, and what is its purpose in networking?
4. What are the main components of an IP address, and how is subnetting used?
5. Describe the purpose of VLANs and how they operate in a network.
6. What is the role of a gateway in networking?
7. Explain the difference between a hub, a switch, and a router.
8. How does DHCP function, and what role does it play in IP address assignment?
9. Describe NAT and its significance in network addressing.
10. What is DNS, and how does it translate domain names to IP addresses?
11. Explain the concept of latency and how it impacts network performance.
12. What are the common causes of network congestion, and how can you mitigate them?
13. Describe the differences between IPv4 and IPv6.
14. How do you troubleshoot a network connectivity issue?
15. What is a MAC address, and how is it used in networking?
16. What security measures can you implement to protect a network?
17. How do you ensure network redundancy and high availability?
18. Explain the concept of Quality of Service (QoS) in networking.
19. Describe the purpose and function of firewalls in a network.
20. How do you identify and address common network performance bottlenecks?