Interview questions for network engineer

1. Describe the OSI model.
2. What is the difference between a repeater, bridge, router? Relate this to the OSI model.
3. Describe an Ethernet switch and where it fits into the OSI model.
4. What is a VLAN? What is an ELAN? What is the difference?
5. Relate FDDI/ATM/SONET to the OSI model.
6. Explain how to configure a host network interface (e.g. IP address, netmask, broadcast address)?
7. Describe Ethernet packet contents: min/max size, header.
8. Describe TCP/IP and its protocols.
9. Describe ATM and what are its current advantages and disadvantages.
10. Describe SONET.
11. What are the maximum distances for CAT5 cabling?
12. Describe UDP and TCP and the differences between the two.
13. What is your current IP address? Hoiw do you find that out on different OSs?
14. Describe what a broadcast storm is.
15. Describe what a runt, a giant, and a late collision are and what causes each of them.
16. How do you distinguish a DNS problem from a network problem?
17. Describe the Bandwidth Delay problem.
18. Describe the principle of multi-layer switching.
19. Describe the purpose and basic functionality of things like HSRP, VRRP etc.