Asked Computer Network questions in Amazon Cloud Support Associate Interview

Hello Everyone, In this Blog Post I am sharing Computer Network questions asked in Amazon Cloud Support Associate interview. I have compiled all these questions from different resources at one place. I hope you will find these questions helpful for your preparation.

1. OSI model with complete details and protocols on each layer.

2. Transmission of messages between layers

3. Difference between router, switch.

4. How is a hub, a router, and a switch different from each other? Explain in terms of broadcast domain.

5. What is a Broadcast Domain?

6. What is the difference between Bandwidth, Delay and Latency?

7. Flow/error control.


9. What is BGP and describe the states - Idle, Connect, Active, Opensent, Openconfirm, Established.

10. Why the TCP/IP model used over OSI model?

11. TCP and SSL handshake. How TCP/ IP connection is established (via 3-way handshake) and terminated?

12. What is SSL and how does it work? How do you protect a website?

13. Difference between TCP/UDP, with example.

14. DHCP and DORA process.

15. How DHCP server is uniquely identified by the client ?

16. MSS/MTU Explain.

17. As MSS was explained in TCP 3 way handshake, explain what is MTU and compare and contrast MSS and MTU together.

18. Why would you choose HTTPS over HTTP? From a technical perspective, what is

19. HTTPS?

20. Port number of HTTP, HTTPS, FTP, DHCP ?

21. What is FTP? what kind of application it used for?

22. How would you secure a website?/How would you make a website secure?

23. What happens when you type

24. How does a web page load, what happens in the background?

25. What is DNS? How does DNS work?

26. DNS resolving ( how to resolve name to IP or what happen when you vist


28. Describe DNS lookup process for Domain name resolution.

29. What is the difference between "Connection Refused" and "Connection Timed

30. Out"? What causes these two things to happen?

31. Is routable?

32. What is a firewall, why do you need it?

33. Concept of Proxy and firewall? Stateless and stateful firewalls?

34. What is the difference between and

35. Trouble shoot slow website.

36. How to view network stats?

37. What does NetStat do? Which Linux command finds routing tables?

38. Command to track and print the path traversed between different routers.

39. What command checks for open ports?

40. What command checks the routing table in Linux?

41. How to setup remote desktop connection using command line in windows

42. A scenario question about packet flow in NAT

43. How do you find out what your IP Address is?

44. What protocol is used and how it is used to gate out from private network.(ARP)?

45. Given the following information: 100,000 hosts on network There is a host with an IP of who cannot connect, why is this? Also, a lot of hosts on the network are reporting that they cannot connect, why is this?

46. Suppose I have a brand new laptop and I wish to connect it to the internet. What should I do, and what shall happen in background before the laptop is connected to the internet? (Ans. Manually assigning IP address or DHCP and DORA procedure. They expect you to explain in depth about DHCP and DORA)

47. What exactly are the requirements to make two computers communicate (they are close to each other, connected to same network) (here, also highlight the fact that how one computer will uniquely identify the other computer)

48. Concept of public and private IPs? Can two systems connected to same network have the same public IPs? How conflict is resolved in that case?

49. Will I able to access if I'm using private IP (say, if I'm a part of an organization). Or will I need a public IP as well to connect with it?

50. If one person is able to access website, while the other person is not, what can be the possible valid reasons for the 2nd person, provided the website is working fine. Why clearing cookies also helps in reaching to a website?

51. My net isn't working, how do i troubleshoot?

If you have any doubt/queries, Please ask in comment section.