260 questions - latest network security engineer interview questions (with answers)

More than half of 2023 has passed. Let me first ask my soul three times: How far have you achieved the goals you set at the beginning of the year? Has the salary increased? Have you found your girlfriend?

​Okay, without disturbing everyone’s heart, let’s get into the main text.

Since I have written a lot of articles and answers related to network security technology before, many readers know that I am engaged in network security related work, so people often ask me in private messages:

• I'm new to network security, how should I learn?

• If you want to find a cybersecurity job, how should you prepare for a technical interview?

• I have been working for less than 2 years and want to look for opportunities to change jobs. Are there any relevant interview questions?

In order to better help you find a high-paying job, today I will share with you three network security engineer interview questions. There are 260 real interview questions in total. I hope they can help you avoid detours during the interview and get the offer faster!

93 Cybersecurity Interview Questions

1. What is SQL injection attack

2. What is XSS attack

3. What is CSRF attack

4. What is a file upload vulnerability

5. DDos attack

6. Important protocol distribution map

7. How the arp protocol works

8. What is RARP? How it works

9. What is dns? How does dns work?

10. What is the rip protocol? How does rip work?

11. Disadvantages of RIP

12. OSPF protocol? How OSPF works

13. Summary of the differences between TCP and UDP?

14. What is three-way handshake and four-way wave? Why does tcp need three-way handshake?

15. The difference between GET and POST

16. The difference between cookies and sessions

17. How does session work?1

18. A complete HTTP request process

19. The difference between HTTPS and HTTP

20. What are the seven-layer models of OSI?

21. The difference between http long connection and short connection

22. How does TCP ensure reliable transmission?

23. What are the common status codes?

24. What is SSL? How does https ensure the security of data transmission (how does SSL work to ensure security)

25. How to ensure that the public key is not tampered with?

26. How to use absolute path in php?

27. What penetration tools do you commonly use, and which one is the most commonly used?

28. Utilization of xss blind typing to intranet server

29. Harpooning and Watering Hole Attacks

30. What is virtual machine escape?

31. Man-in-the-middle attack?

32. TCP three-way handshake process?

33. Seven-layer model?

34. Understanding cloud security

35. Have you ever known about websocket?

36. What is DDOS? What are they? What are CC attacks? What are the differences?

37. What is a land attack?

38. How will you conduct information collection?

39. What is a CRLF injection attack?

40. Prevent XSS from both front-end and back-end perspectives?

41. How to secure a port?

42. Webshell detection ideas?

43. What is GPC? How to bypass it if it is enabled

44. What are the commonly used encryption algorithms on the web?

45. What else can XSS do besides getting cookies?

46. Carrier (or other) network hijacking

47. What is DNS spoofing

48. Buffer overflow principles and defenses

49. Cyber ​​security incident emergency response

50. Internal security of the enterprise

51. Before the business goes online, how to test it and from what angles

52. There is a vulnerability in the application, but it cannot be repaired or deactivated. What should you do?

53. How to protect against CSRF?

54. File upload bypass method?

55. Verification code related utilization points

56. What cookies will you test?

57. Name a few types of business logic vulnerabilities?

58. Profile file contains vulnerability

59. What are some examples of business logic vulnerabilities and arbitrary password resets by users, and what factors caused them?

60. During the penetration test, I found a function that can only upload zip files. What are the possible ideas?

61. Why does the aspx Trojan have greater permissions than asp?

62. What are some ideas for having only one login page?

63. Which request headers are dangerous?

64. Talk about the difference between horizontal/vertical/unauthorized unauthorized access?

65. What is xss? The dangers and principles of executing stored xss

66. The host is suspected to have been invaded. Where should I check the logs?

67. python commonly used standard library

68. What is the difference between reverse tcp and bind tcp?

69. What problems may occur during the oauth authentication process and what kind of vulnerabilities may result?

70. How to get the real IP for a website that has a CDN

71. How to achieve cross-domain?

72. What is the difference between jsonp cross-domain and CORS cross-domain?

73. Algorithms? What sorting have you learned about?

74. SSRF exploit?

75. Common backdoor methods?

76. How to bypass open basedir access directory restrictions?

77. What are the common problems in PHP code audit?

78. In the red-blue confrontation, the scene and posture of the blue team counterattacking the red team?

79. Linux scheduled tasks, what would a hacker do to hide his scheduled tasks?

80. How many common ways to getshell without Redis authorization?

81. JWT attack methods? (Header, payload, signature)

82. JAVA middleware vulnerabilities, what are some examples?

83. What vulnerabilities can DNS takeout be used for?

84. Summary of middleware vulnerabilities?

85. Let’s talk about the ideas for escalating privileges in Windows systems and Linux systems?

86. What frameworks are there for Python and what vulnerabilities have appeared in them?

87. The difference between small program penetration and ordinary penetration

88. Four major components of vulnerability testing in the app itself

89. IDS/IPS protection principles and bypass ideas

90. Utilization of json csrf

91. What vulnerabilities can be tested using data packets in json format?

92. How to collect information on intranet server?

93. If you take down a certain machine at the boundary layer of the intranet, how to detect other machines on the intranet?

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86 Daotian Rongxin Network Security Interview Questions and Answers

1. Protect against common web attacks

2. Important protocol distribution layer

3. How the arp protocol works

4. What is the rip protocol? How rip works

5. What is RARP? working principle

6. OSPF protocol? How OSPF works

7. Summary of the differences between TCP and UDP

8. What is three-way handshake and four-way wave?

9. Why does tcp need three handshakes?

10. What is dns? How dns works

11. A complete HTTP request process

12. The difference between cookies and sessions

13. The difference between GET and POST

14. The difference between HTTPS and HTTP

15. How does session work?

16. The difference between http long connection and short connection

17. What are the seven-layer models of OSI?

18. How does session work? What is TCP packet sticking/unpacking? cause? solution

19. How does TCP ensure reliable transmission?

20. The difference between URI and URL

21. What is SSL?

22. How https ensures the security of data transmission (

23. How SSL works to ensure security)

24. The application layer protocol corresponding to TCP, the application layer protocol corresponding to UDP

25. What are the common status codes?

26. When you get a station to be tested, what do you think you should do first?

27. MySQL website injection, what is the difference between 5.0 and above and 5.0 and below?

28. During the penetration process, what value does it bring to us to collect the email addresses of target site registrants?

29. Determine the significance of the website’s CMS for penetration

30. Which versions of containers are currently known to have parsing vulnerabilities, specific examples

31. Found the demo.jsp?uid=110 injection point. What are your ideas for obtaining webshell? Which one is preferred?

32. What are the types of sql injection? What is the difference between these types of injections?

33. How many types of XSS are there? Briefly describe cookies and sessions

34. Please list common web scanning tools that can automate websites

35. What penetration tools do you commonly use and which one is the most commonly used?

36. Windows permission control, what are the ways to create backdoors?

37. What functions does the php file contain?

38. What functions are executed by the php command?

39. How to penetrate phpmyadmin

40. What are the current database parameters for sqlmap query?

41. How to determine whether a web server is linux or windows

42. What are CSRF, XSS, XXE and Ssrf? and how to fix it

43. Common parsing vulnerabilities of different web servers? How to use IIS apache nginx etc.

44. Where to start with linux and windows emergencies respectively

45. What are the items in the http return header? Can you name a few and what their functions are?

46. How to use redis without authorization in penetration

47. Penetration test execution process

48. Briefly introduce the nmap tool and its use

49. How nmap circumvents security devices during scanning

50. Briefly introduce the metasploit tool

51. What modules are there in metasploit

52. Have you ever been in contact with cs? Let’s introduce the functions of CS

53. What is Xray? What functions does it have? how to use

54. Introducing the burpsuite tool and its commonly used modules

55. What are the webshell management tools? What's the difference

56. What are OWASP TOP 10? What are the vulnerabilities in the OWASP top10?

57. Database type? Common ports? What is SQL injection

58. What is stack injection? What are the ways to escalate mysql privileges?

59. Can mysql execute commands after elevating privileges?

60. How to break out characters being escaped when injected? How to defend against SQL injection

61. What is XSS? What are the types of XSS? What are the dangers of XSS vulnerabilities?

62. What are dos and ddos ​​attacks? How to defend

63. What packet capture tools have you used? how to use

64. What command is used to modify file permissions? What is the format like?

65. Which command should be used to copy files? If you need to copy them together with the folder,

66. Which command is used to move files? Which command to use to change name

67. What command should be used to terminate the process? What parameters should be taken?

68. Which command is used to move files? Which command to use to change name

69. Windows intrusion troubleshooting ideas

70. Linux intrusion troubleshooting ideas

71. Introducing Linux security hardening

72. Introducing Windows security hardening

73. What safety equipment have you come into contact with? Please introduce their functions.

74. How to troubleshoot device false alarms

75. How to deal with source tracing attacks after taking the shell

76. How to deal with .exe files

77. How to view the current process

78. Introduce common web application component ports (such as mysql, tomcat)

79. How to check local port connection status in windows

80. Where are the log files for Windows and Linux?

81. There is a webshell on the server, how to deal with it?

82. What is SSL? How does https ensure the security of data transmission (how does SSL work to ensure security)

83. How to ensure that the public key is not tampered with?

84. What are the common status codes?

85. How does TCP ensure reliable transmission?

86. The difference between http long connection and short connection

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71 Cybersecurity Interview Questions

1. How to use absolute path in php?

2. What penetration tools do you commonly use, and which one is the most commonly used?

3. Utilization of xss blind typing to intranet server

4. Harpooning and watering hole attacks?

5. What is virtual machine escape?

6. Man-in-the-middle attack?

7. TCP three-way handshake process?

8. Seven-layer model?

9. Understanding cloud security

10. Have you heard about websocket?

11. What is DDOS? What? What is CC attack? What's the difference?

12. What is a land attack?

13. How will you conduct information gathering?

14. What is a CRLF injection attack?

15. Prevent XSS from both front-end and back-end perspectives?

16. How to protect the security of a port?

17. Webshell detection ideas?

18. I found an IIS website, how to test its vulnerabilities? (depending on version)

19. What is GPC? How to bypass it if it is enabled?

20. What are the commonly used encryption algorithms on the web?

21. What else can XSS do besides getting cookies?

22. Carrier (or other) network hijacking

23. What is DNS spoofing

24. Buffer overflow principles and defenses

25. Cyber ​​security incident emergency response

26. Internal security of the enterprise

27. Before the business goes online, how to test it and from what angles

28. There is a vulnerability in the application, but it cannot be repaired or deactivated. What should you do?

29. How to protect against CSRF?

30. File upload bypass method?

31. Verification code related utilization points

32. What cookies will you test?

33. Name a few types of business logic vulnerabilities?

34. Profile file contains vulnerability

35. What are some examples of business logic vulnerabilities and arbitrary password resets by users, and what factors caused them?

36. During the penetration test, I found a function that can only upload zip files. Are there any possible ideas?

37. Why does the aspx Trojan have greater permissions than asp?

38. What are some ideas for having only one login page?

39. Which request headers are dangerous?

40. Talk about the difference between horizontal/vertical/unauthorized unauthorized access?

41. What does xss have? The dangers and principles of executing stored xss

42. The host is suspected to have been invaded. Where should I check the logs?

43. python commonly used standard library

44. What is the difference between reverse_tcp and bind_tcp?

45. What problems may occur during the oauth authentication process and what kind of vulnerabilities may result?

46. How to get the real IP for a website that has a CDN

47. How to achieve cross-domain?

48. What is the difference between jsonp cross-domain and CORS cross-domain?

49. algorithm? Have you learned about sorting?

50. SSRF exploit?

51. Common backdoor methods?

52. How to bypass open_basedir access directory restrictions?

53. What are the common problems in PHP code audit?

54. In the red-blue confrontation, the scene and posture of the blue team counterattacking the red team?

55. Linux scheduled tasks, what would a hacker do to hide his scheduled tasks?

56. How many common ways to getshell without Redis authorization?

57. JWT attack method? (header, payload, signature)

58. What are some examples of vulnerabilities in JAVA middleware?

59. What vulnerabilities can DNS takeout be used for?

60. HTTP-Only prohibits JS from reading cookie information. How to bypass this to obtain cookies?

61. Summary of middleware vulnerabilities?

62. Let’s talk about the idea of ​​elevating privileges in Windows and Linux systems?

63. What frameworks does python have and what vulnerabilities have appeared in them?

64. The difference between small program penetration and ordinary penetration

65. Four major components of vulnerability testing of the app itself

66. IDS/IPS protection principles and bypass ideas

67. Utilization of json csrf

68. What vulnerabilities can be tested using data packets in json format?

69. Briefly describe the principle and utilization method of xxe vulnerability

70. How to collect information on intranet server?

71. If a machine at the boundary layer of the intranet is taken down, how to detect other machines on the intranet?

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I hope these 3 sets of interview questions can help you avoid detours during the interview and get the offer faster!

As long as you like my article today, my private network security learning materials will be shared with you for free. Come and see what is available.

Network security learning resource sharing:

Finally, I would like to share with you a complete set of network security learning materials that I have studied myself. I hope it will be helpful to friends who want to learn network security!

Getting Started with Zero Basics

For students who have never been exposed to network security, we have prepared a detailed learning and growth roadmap for you. It can be said to be the most scientific and systematic learning route. It will be no problem for everyone to follow this general direction.

[Click to receive] CSDN gift package: "Hacker & Network Security Introduction & Advanced Learning Resource Package" free sharing

1. Learning roadmap

There are a lot of things to learn about attack and defense. I have written down the specific things you need to learn in the road map above. If you can learn them all, you will have no problem taking on private work.

2. Video tutorial

Although there are many learning resources on the Internet, they are basically incomplete. This is a video tutorial on network security that I recorded myself. I have accompanying video explanations for every knowledge point in the roadmap above. [Click to receive the video tutorial]

I also compiled the technical documents myself, including my experience and technical points in participating in large-scale network security operations, CTF and digging SRC vulnerabilities. There are also more than 200 e-books[Click to receive it Technical Documentation]

(They are all packaged into one piece and cannot be expanded one by one. There are more than 300 episodes in total)

3. Technical documents and e-books

I also compiled the technical documents myself, including my experience and technical points in participating in large-scale network security operations, CTF and digging SRC vulnerabilities. There are also more than 200 e-books[Click to receive it Books]

4. Toolkit, interview questions and source code

"If you want to do your job well, you must first sharpen your tools." I have summarized dozens of the most popular hacking tools for everyone. The scope of coverage mainly focuses on information collection, Android hacking tools, automation tools, phishing, etc. Interested students should not miss it.

Finally, here are the interview questions about network security that I have compiled over the past few years. If you are looking for a job in network security, they will definitely help you a lot.

These questions are often encountered when interviewing Sangfor, Qi Anxin, Tencent or other major companies. If you have good questions or good insights, please share them.

Reference analysis: Sangfor official website, Qi’anxin official website, Freebuf, csdn, etc.

Content features: Clear organization and graphical representation to make it easier to understand.

Summary of content: Including intranet, operating system, protocol, penetration testing, security service, vulnerability, injection, XSS, CSRF, SSRF, file upload, file download, file inclusion, XXE, logical vulnerability, tools, SQLmap, NMAP, BP, MSF…

Due to limited space, only part of the information is displayed. You need to click the link below to obtain it
CSDN gift package: "Hacker & Network Security Introduction & Advanced Learning Resource Package" Share for free