164 Must‑Know Network Security Interview Questions (Full List)
This article provides two comprehensive collections of network security interview questions, totaling 164 real‑world questions that cover fundamentals such as SQL injection, XSS, CSRF, protocol basics, cryptography, penetration testing techniques, and incident response, helping candidates prepare effectively for technical interviews and increase their chances of landing high‑pay offers.
Network Security Interview Questions
To help job seekers secure high‑salary positions, we share two collections of real interview questions, totaling 164 questions.
Set ONE – 93 Questions
What is SQL injection attack?
What is XSS attack?
What is CSRF attack?
What is file upload vulnerability?
What is DDoS attack?
Important protocol distribution diagram
How does the ARP protocol work?
What is RARP and how does it work?
What is DNS and how does it work?
What is RIP protocol and how does it work?
What are the drawbacks of RIP?
What is OSPF protocol and how does it work?
Difference between TCP and UDP?
What is the three‑way handshake and four‑way termination? Why does TCP need the three‑way handshake?
Difference between GET and POST?
Difference between Cookies and Session?
How does Session work?
Complete HTTP request process
Difference between HTTPS and HTTP?
What are the seven layers of the OSI model?
Difference between long‑connection and short‑connection?
How does TCP ensure reliable transmission?
Common HTTP status codes?
What is SSL? How does HTTPS guarantee data security?
How to ensure the public key is not tampered?
PHP absolute path disclosure method?
Which penetration tools do you use most?
How to exploit XSS blind to an internal server?
What are spear‑phishing and water‑hole attacks?
What is virtual machine escape?
What is a man‑in‑the‑middle attack?
How to protect a port?
Webshell detection ideas?
What is GPC and how to bypass it?
Common web encryption algorithms?
What else can XSS do besides stealing cookies?
Network hijacking by ISP or others?
What is DNS spoofing?
Buffer overflow principle and defense?
Network security incident response?
Internal corporate security?
How to test a business before launch?
What to do when a vulnerability cannot be fixed or disabled?
How to protect against CSRF?
File upload bypass methods?
Captcha related exploitation points?
What to test in cookies?
Examples of business‑logic password reset vulnerabilities?
Brief description of file inclusion vulnerability?
How to exploit a zip‑only upload function?
Why does an ASPX webshell have higher privileges than ASP?
How to attack when there is only a login page?
Which request headers are dangerous?
Difference between horizontal, vertical, and unauthorized privilege escalation?
What is XSS and the danger of stored XSS?
Which logs to check when a host is suspected of intrusion?
Common Python standard libraries?
Difference between reverse_tcp and bind_tcp?
Possible OAuth authentication issues and resulting vulnerabilities?
How to obtain the real IP of a CDN‑protected site?
How to achieve cross‑origin requests?
Difference between JSONP and CORS cross‑origin?
Which sorting algorithms do you know?
How to exploit SSRF?
Common backdoor methods?
How to bypass open_basedir restrictions?
Typical pitfalls in PHP code audit?
Blue‑team counter‑attack scenarios in red‑blue exercises?
How hackers hide Linux cron jobs?
Common Redis unauthorized get‑shell methods?
JWT attack techniques (header, payload, signature)
Examples of Java middleware vulnerabilities
Which vulnerabilities can DNS exfiltration be used for?
How to bypass HTTP‑Only cookie protection?
Privilege escalation ideas for Windows and Linux
Which Python frameworks have known vulnerabilities?
Differences between mini‑program penetration and regular web penetration
Four components of app vulnerability testing
IDS/IPS protection principles and bypass ideas
How to exploit JSON CSRF?
Which vulnerabilities can be tested with JSON payloads?
Brief explanation of XXE vulnerability
How to gather information on an internal server?
How to probe other internal hosts after compromising a boundary machine?
Set TWO – 71 Questions
PHP absolute path disclosure method?
Which penetration tools do you use most?
XSS blind attack on internal server
Spear‑phishing and water‑hole attacks
What is virtual machine escape?
Man‑in‑the‑middle attack?
TCP three‑way handshake process?
OSI seven‑layer model?
Understanding of cloud security
Do you know WebSocket?
What is DDoS? Types? What is CC attack? Differences?
What is LAND attack?
How would you conduct information gathering?
What is CRLF injection?
How to prevent XSS from front‑end and back‑end perspectives?
How to protect a single port?
Webshell detection ideas?
How to test an IIS site based on its version?
What is GPC and how to bypass it?
Common web encryption algorithms?
What else can XSS do besides stealing cookies?
Network hijacking by ISP or others?
What is DNS spoofing?
Buffer overflow principle and defense
Network security incident response
Internal corporate security
How to test a business before launch?
What to do when a vulnerability cannot be fixed or disabled?
How to protect against CSRF?
File upload bypass methods?
Captcha related exploitation points
What to test in cookies?
Examples of business‑logic password reset vulnerabilities
How to exploit a zip‑only upload function?
Why does an ASPX webshell have higher privileges than ASP?
How to attack when there is only a login page?
Which request headers are dangerous?
Difference between horizontal, vertical, and unauthorized privilege escalation?
What is XSS and the danger of stored XSS?
Which logs to check when a host is suspected of intrusion?
Common Python standard libraries
Difference between reverse_tcp and bind_tcp
Possible OAuth authentication issues and resulting vulnerabilities
How to obtain the real IP of a CDN‑protected site
How to achieve cross‑origin requests
Difference between JSONP and CORS cross‑origin
Which sorting algorithms do you know
How to exploit SSRF
Common backdoor methods
How to bypass open_basedir restrictions
Typical pitfalls in PHP code audit
Blue‑team counter‑attack scenarios in red‑blue exercises
How hackers hide Linux cron jobs
Common Redis unauthorized get‑shell methods
JWT attack techniques (header, payload, signature)
Examples of Java middleware vulnerabilities
Which vulnerabilities can DNS exfiltration be used for
How to bypass HTTP‑Only cookie protection
Summary of middleware vulnerabilities
Privilege escalation ideas for Windows and Linux
Which Python frameworks have known vulnerabilities
Differences between mini‑program penetration and regular web penetration
Four components of app vulnerability testing
IDS/IPS protection principles and bypass ideas
How to exploit JSON CSRF
Which vulnerabilities can be tested with JSON payloads
Brief explanation of XXE vulnerability
How to gather information on an internal server
How to probe other internal hosts after compromising a boundary machine
Sample excerpts of the material are shown below:
Materials are collected from the internet for free sharing; if any copyright issues arise, please contact us for removal.
Signed-in readers can open the original source through BestHub's protected redirect.
This article has been distilled and summarized from source material, then republished for learning and reference. If you believe it infringes your rights, please contactand we will review it promptly.
MaGe Linux Operations
Founded in 2009, MaGe Education is a top Chinese high‑end IT training brand. Its graduates earn 12K+ RMB salaries, and the school has trained tens of thousands of students. It offers high‑pay courses in Linux cloud operations, Python full‑stack, automation, data analysis, AI, and Go high‑concurrency architecture. Thanks to quality courses and a solid reputation, it has talent partnerships with numerous internet firms.
How this landed with the community
Was this worth your time?
0 Comments
Thoughtful readers leave field notes, pushback, and hard-won operational detail here.