1. What is the primary function of a firewall?
A) To block all incoming and outgoing traffic
B) To monitor and control network traffic based on security rules
C) To provide unlimited internet access
D) To increase network speed
✅ Answer: B) To monitor and control network traffic based on security rules
2. At which layer of the OSI model do packet filtering firewalls operate?
A) Layer 2 (Data Link Layer)
B) Layer 3 (Network Layer)
C) Layer 5 (Session Layer)
D) Layer 7 (Application Layer)
✅ Answer: B) Layer 3 (Network Layer)
3. What is a major limitation of a packet filtering firewall?
A) Cannot inspect packet contents
B) Too expensive to implement
C) Slows down network performance
D) Cannot filter traffic
✅ Answer: A) Cannot inspect packet contents
4. Which type of firewall tracks the state of active connections?
A) Packet Filtering Firewall
B) Stateless Firewall
C) Stateful Inspection Firewall
D) Proxy Firewall
✅ Answer: C) Stateful Inspection Firewall
5. Which firewall type acts as an intermediary between a user and the internet?
A) Packet Filtering Firewall
B) Stateful Firewall
C) Proxy Firewall
D) Circuit-Level Firewall
✅ Answer: C) Proxy Firewall
6. What is the main purpose of a Web Application Firewall (WAF)?
A) To filter IP addresses
B) To protect web applications from threats like SQL injection and XSS
C) To block all outgoing traffic
D) To accelerate web page loading
✅ Answer: B) To protect web applications from threats like SQL injection and XSS
7. Which of the following is NOT a type of firewall?
A) Hardware Firewall
B) Software Firewall
C) Cloud Firewall
D) Internet Firewall
✅ Answer: D) Internet Firewall
8. What is a Next-Generation Firewall (NGFW)?
A) A firewall that only blocks incoming connections
B) A firewall that combines traditional firewalls with advanced security features
C) A firewall with no logging feature
D) A firewall that does not use any security rules
✅ Answer: B) A firewall that combines traditional firewalls with advanced security features
9. Which firewall method examines packet headers but does not track connection state?
A) Proxy Filtering
B) Packet Filtering
C) Stateful Inspection
D) Deep Packet Inspection
✅ Answer: B) Packet Filtering
10. What is the key advantage of a stateful firewall over a stateless firewall?
A) It is faster in processing packets
B) It tracks the state of active network connections
C) It does not require any rules
D) It blocks all incoming traffic
✅ Answer: B) It tracks the state of active network connections
11. In which layer does a proxy firewall operate?
A) Layer 2
B) Layer 3
C) Layer 4
D) Layer 7
✅ Answer: D) Layer 7
12. Which firewall technique inspects the actual content of a packet?
A) Stateful Inspection
B) Packet Filtering
C) Deep Packet Inspection (DPI)
D) Circuit-Level Filtering
✅ Answer: C) Deep Packet Inspection (DPI)
13. What is a disadvantage of a proxy firewall?
A) Does not provide security
B) Slower performance due to deep traffic inspection
C) Cannot hide user identities
D) Cannot filter malicious content
✅ Answer: B) Slower performance due to deep traffic inspection
14. A firewall that is integrated within network hardware is called a:
A) Software Firewall
B) Cloud Firewall
C) Hardware Firewall
D) Stateful Firewall
✅ Answer: C) Hardware Firewall
15. Which type of firewall uses Access Control Lists (ACLs) to filter traffic?
A) Packet Filtering Firewall
B) Proxy Firewall
C) Next-Generation Firewall
D) Web Application Firewall
✅ Answer: A) Packet Filtering Firewall
16. What is the function of a firewall in a corporate network?
A) To prevent unauthorized access
B) To increase internet speed
C) To replace antivirus software
D) To eliminate all cyber threats
✅ Answer: A) To prevent unauthorized access
17. What type of firewall is best suited for cloud-based applications?
A) Packet Filtering Firewall
B) Cloud Firewall
C) Stateful Inspection Firewall
D) Proxy Firewall
✅ Answer: B) Cloud Firewall
18. Which protocol is commonly used by firewalls for secure remote management?
A) HTTP
B) Telnet
C) SSH
D) FTP
✅ Answer: C) SSH
19. Which firewall mechanism helps prevent Distributed Denial of Service (DDoS) attacks?
A) Stateless Filtering
B) Web Application Firewall (WAF)
C) Circuit-Level Filtering
D) VPN
✅ Answer: B) Web Application Firewall (WAF)
20. Which of the following is an example of a commercial firewall product?
A) Windows Defender
B) Cisco ASA
C) Linux Kernel
D) Google Chrome
✅ Answer: B) Cisco ASA
