164 Real Network Security Interview Questions to Ace Your Tech Interview
This article compiles two extensive collections of network security interview questions—93 and 71 items respectively—covering topics such as SQL injection, XSS, CSRF, DDoS, protocol fundamentals, cloud security, penetration tools, and incident response, providing a comprehensive resource for anyone preparing for a security engineering role.
Recently many friends have asked how to prepare for network security technical interviews, so to help job seekers secure high‑pay positions we share two sets of interview questions, totaling 164 real questions.
93 Network Security Interview Questions
What is SQL injection?
What is XSS attack?
What is CSRF attack?
What is file upload vulnerability?
What is DDoS attack?
Important protocol distribution diagram
How does ARP work?
What is RARP and how does it work?
What is DNS and how does it work?
What is RIP and how does it work?
Disadvantages of RIP
What is OSPF and how does it work?
Difference between TCP and UDP?
What is the three‑way handshake and four‑way termination in TCP?
Difference between GET and POST
Difference between Cookies and Session
How does Session work?
Complete HTTP request process
Difference between HTTPS and HTTP
OSI seven‑layer model
Difference between long‑connection and short‑connection
How does TCP ensure reliable transmission?
Common HTTP status codes
What is SSL and how does HTTPS guarantee security?
How to prevent public key tampering?
PHP absolute path disclosure methods
Common penetration tools and the most used one
How to exploit blind XSS to reach internal servers?
What are spear‑phishing and water‑hole attacks?
What is virtual machine escape?
What is 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
Testing before product launch – angles to consider
What to do when a vulnerability cannot be fixed or disabled
How to protect against CSRF?
File upload bypass methods
Captcha exploitation points
What to test in cookies?
Examples of business‑logic password reset vulnerabilities
How to handle zip‑only upload functionality in penetration testing?
Why does an ASPX webshell have higher privileges than ASP?
Strategies when only a login page exists
Dangerous request headers
Difference between horizontal, vertical, and unauthorized privilege escalation
What is XSS? Risks and mechanism of stored XSS
Which logs to check when a host is possibly compromised?
Common Python standard libraries
Difference between reverse TCP and bind TCP
OAuth authentication issues and related 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
Sorting algorithms you know
SSRF exploitation
Common backdoor methods
Open‑basedir bypass techniques
Common pitfalls in PHP code audit
Blue‑team counter‑attack tactics in red‑blue exercises
How attackers hide Linux cron jobs
Common Redis unauthenticated get‑shell methods
JWT attack techniques (header, payload, signature)
Java middleware vulnerabilities examples
DNS exfiltration usage
Middleware vulnerability summary
Privilege escalation ideas for Windows vs Linux
Python frameworks and associated vulnerabilities
Differences between mini‑program penetration and regular web penetration
Four major components for app vulnerability testing
IDS/IPS protection principles and bypass ideas
JSON CSRF exploitation
Vulnerabilities detectable in JSON payloads
XXE vulnerability principle and exploitation
How to gather information on an internal server
How to probe other internal machines after compromising a boundary host
71 Network Security Interview Questions
PHP absolute path disclosure method?
Most commonly used penetration tool?
Blind XSS to internal server exploitation
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 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
Testing before product launch – angles to consider
What to do when a vulnerability cannot be fixed or disabled
How to protect against CSRF?
File upload bypass methods?
Captcha exploitation points
What to test in cookies
Examples of business‑logic password reset vulnerabilities
How to handle zip‑only upload functionality in penetration testing?
Why does an ASPX webshell have higher privileges than ASP?
Strategies when only a login page exists
Dangerous request headers
Difference between horizontal, vertical, and unauthorized privilege escalation
What is XSS? Risks and mechanism of stored XSS
Which logs to check when a host is possibly compromised?
Common Python standard libraries
Difference between reverse TCP and bind TCP
OAuth authentication issues and related 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
Sorting algorithms you know
SSRF exploitation
Common backdoor methods
Open‑basedir bypass techniques
Common pitfalls in PHP code audit
Blue‑team counter‑attack tactics in red‑blue exercises
How attackers hide Linux cron jobs
Common Redis unauthenticated get‑shell methods
JWT attack techniques (header, payload, signature)
Java middleware vulnerabilities examples
DNS exfiltration usage
How to bypass HTTP‑Only cookie restriction
Middleware vulnerability summary
Privilege escalation ideas for Windows vs Linux
Python frameworks and associated vulnerabilities
Differences between mini‑program penetration and regular web penetration
Four major components for app vulnerability testing
IDS/IPS protection principles and bypass ideas
JSON CSRF exploitation
Vulnerabilities detectable in JSON payloads
XXE vulnerability principle and exploitation
How to gather information on an internal server
How to probe other internal machines after compromising a boundary host
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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.
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