Basic Networking Interview Questions

  1. How can I put my socket in non-blocking mode?
  2. How do I monitor the activity of sockets?
  3. How do you distinguish a DNS problem from a network problem?
  4. What is the role of TCP protocol and IP protocol?
  5. Explain the functionality of PING?
  6. Explain Layers in TCP/IP?
  7. Describe an Ethernet switch and where it fits into the OSI model?
  8. Explain how to configure a host network interface (e.g. IP address, netmask, broadcast address)?
  9. Describe ATM and what are its current advantages and disadvantages?
  10. Explain the core naming mechanism, Domain Name System (DNS)?
  11. Describe what a runt, a giant, and a late collision are and what causes each of them?
  12. Describe UDP and TCP and the differences between the two?
  13. Can I connect two computers to internet using same line?
  14. What is DHCP?
  15. Describe the purpose and basic functionality of things like HSRP, VRRP etc?
  16. What is a VLAN? What is an ELAN? What is the difference?
  17. Define the term Protocol?
  18. What are some of the problems associated with operating a switched LAN?
  19. What is the difference between MUTEX and Semaphore?
  20. What is UDP?
  21. Describe Ethernet packet contents: min/max size, header?
  22. Describe what a broadcast storm is?
  23. Describe the Bandwidth Delay problem?
  24. What is LAN?
  25. How to get IP header of a UDP message?
  26. Why do I sometimes lose a server’s address when using more than one server?
  27. What is priority inversion?
  28. What is multicasting?
  29. Describe the OSI model?
  30. What is your current IP address?
  31. How can I make my server a daemon?
  32. What are the maximum distances for CAT5 cabling?
  33. Define File Transfer Protocol?
  34. What is the difference Between an Intranet and the Internet?
  35. Explain the 7 Layers of OSI?
  36. What is Firewall?
  37. What is the difference between a repeater, bridge and a router?
  38. How should I choose a port number for my server?
  39. Describe TCP/IP and its protocols?
  40. What sort of cabling is suitable for Fast Ethernet protocols?
  41. How many bytes are there in an IPX network address?
  42. How would you define IP address?
  43. Relate FDDI/ATM/SONET to the OSI model?
  44. What are RAW sockets?
  45. What is a Class D IP address?
  46. What is a message queue?
  47. What is a network? What are the different kinds of network? Explain them?
  48. What are network topologies? Explain Ring, Bus and Star topology?
  49. Explain working of ping, telnet and gopher?
  50. Describe SONET?
  51. Describe the principle of multi-layer switching?
  52. How can I be sure that a UDP message is received?
  53. Explain IP, TCP and UDP?