MCQs

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1. Network layer firewall works as a:
   a. Frame filter
   b. Packet filter
   c. Content filter
   d. Virus filter
   Answer: b. Packet filtersanfoundry
2. Which of the following is not a type of firewall?
   a. Packet Filtering Firewall
   b. Dual Homed Gateway Firewall
   c. Screen Host Firewall
   d. Dual Host Firewall
   Answer: d. Dual Host Firewallsanfoundry
3. A firewall is installed at the point where the secure internal network and untrusted external network meet—this is called:
   a. Chock point
   b. Meeting point
   c. Firewall point
   d. Secure point
   Answer: a. Chock pointgdcramban+1
4. A proxy firewall filters at which OSI layer?
   a. Physical layer
   b. Data link layer
   c. Network layer
   d. Application layer
   Answer: d. Application layersanfoundry
5. Which type of firewall maintains a list of active connections (state table)?
   a. Routing firewall
   b. Stateful firewall
   c. Bridging firewall
   d. Stateless firewall
   Answer: b. Stateful firewallscribd
6. What is the main function of a firewall?
   a. To allow all traffic
   b. To speed up network
   c. To block unauthorized access
   d. To route traffic only
   Answer: c. To block unauthorized accesstestbook+1
7. Which layer does a packet filtering firewall operate at?
   a. Data link layer
   b. Application layer
   c. Network layer
   d. Presentation layer
   Answer: c. Network layerstudocu+1
8. Stateless firewalls:
   a. Track state of connections
   b. Are always hardware-only
   c. Do not track state of connections
   d. Only filter web traffic
   Answer: c. Do not track state of connectionsonlineexammaker+1
9. ACL stands for:
   a. Automatic Control Log
   b. Access Control List
   c. Access Condition Log
   d. Authorized Control List
   Answer: b. Access Control Listsanfoundry
10. Which type of firewall can act as an intermediary between client and server?
    a. Application Firewall
    b. Proxy Firewall
    c. Stateless Firewall
    d. Circuit-level Gateway
    Answer: b. Proxy Firewallsanfoundry+1
11. Which is not a legitimate advantage of firewalls?
    a. Improved Security
    b. Regulatory Compliance
    c. Increased server hardware cost
    d. Access control
    Answer: c. Increased server hardware costsanfoundry
12. A demilitarized zone (DMZ) in firewall configuration is:
    a. Where all backups are kept
    b. Where internet access is prohibited
    c. A neutral zone between internal network and internet
    d. Where firewall software is updated
    Answer: c. A neutral zone between internal network and internetonlineexammaker+1
13. Firewalls prevent:
    a. Authorized access
    b. Unauthorized access
    c. DNS resolution
    d. Packet transfer
    Answer: b. Unauthorized accesstestbook+1
14. Which is NOT a common firewall technique?
    a. Packet filtering
    b. Stateful inspection
    c. Port knocking
    d. Proxy service
    Answer: c. Port knockingsanfoundry
15. To allow/deny web traffic, firewall rules often use which protocol?
    a. SMTP
    b. HTTP
    c. FTP
    d. All of the above
    Answer: d. All of the aboveonlineexammaker
16. Which is a hardware-only firewall example?
    a. Windows Defender Firewall
    b. Ubuntu UFW
    c. Cisco ASA Appliance
    d. iptables
    Answer: c. Cisco ASA Appliancesanfoundry+1
17. Packet filtering firewalls are often implemented on:
    a. Routers
    b. Switches
    c. Hubs
    d. Repeaters
    Answer: a. Routerssanfoundry
18. Configuration that allows all incoming/outgoing traffic by default is called:
    a. Whitelisting
    b. Blacklisting
    c. Open policy
    d. Closed policy
    Answer: c. Open policyonlineexammaker
19. Which type inspects payload/application data?
    a. Stateful firewall
    b. Packet-filtering firewall
    c. Application-layer firewall
    d. Circuit-level gateway
    Answer: c. Application-layer firewallstudocu+2
20. Which is FALSE about NAT (in firewall context)?
    a. Hides internal IP addresses
    b. Prevents web browsing
    c. Enhances security
    d. Translates public-private addresses
    Answer: b. Prevents web browsingsanfoundry
21. ACL rules in a firewall are set by:
    a. Internet provider
    b. Network Administrator
    c. Randomly
    d. DNS server
    Answer: b. Network Administratorsanfoundry
22. Firewalls can protect against:
    a. Insider threats only
    b. Only known viruses
    c. Both internal and external threats
    d. Only DoS attacks
    Answer: c. Both internal and external threatssanfoundry
23. URL filtering is used to:
    a. Block TCP ports
    b. Allow/deny access to specific sites
    c. Enhance DNS resolution
    d. Speed up browsing
    Answer: b. Allow/deny access to specific sitessanfoundry
24. A firewall that allows/denies based on MAC address performs:
    a. Network address filtering
    b. Domain name filtering
    c. MAC filtering
    d. Application filtering
    Answer: c. MAC filteringsanfoundry
25. Main disadvantage of a stateless firewall:
    a. Slower performance
    b. Cannot track connection state
    c. Expensive
    d. Incompatible with routers
    Answer: b. Cannot track connection statesanfoundry+2
26. Which is a software firewall?
    a. Cisco ASA
    b. Windows Defender
    c. SonicWall Appliance
    d. Juniper SRX
    Answer: b. Windows Defendersanfoundry
27. One benefit of firewall monitoring/logging is:
    a. Cost increase
    b. Traffic hiding
    c. Detecting security incidents
    d. Slower performance
    Answer: c. Detecting security incidentssanfoundry
28. Which of these is not a function of a firewall?
    a. Packet filtering
    b. VPN support
    c. Device repair
    d. Network Address Translation
    Answer: c. Device repairsanfoundry
29. What is a “choke point” with respect to firewall architecture?
    a. Point of power loss
    b. Place where networks converge and are protected via firewall
    c. Backup point
    d. Password storage
    Answer: b. Place where networks converge and are protectedgdcramban+1
30. Application Layer Firewalls filter traffic based on:
    a. IP address only
    b. Port only
    c. Application data/content
    d. Physical cable type
    Answer: c. Application data/contentstudocu+1
31. Which of these is handled by an Access Control List (ACL)?
    a. Allowing/denying hosts/services
    b. Encrypting data
    c. Compressing web traffic
    d. IP renumbering
    Answer: a. Allowing/denying hosts/servicessanfoundry+1
32. Filtering packets based on port, protocol, and address is called:
    a. Packet filtering
    b. Content filtering
    c. Proxy filtering
    d. State inspection
    Answer: a. Packet filteringsanfoundry
33. Which firewall type acts as both hardware and software?
    a. Dual-mode firewall
    b. Hybrid firewall
    c. Stateless firewall
    d. Packet-switch firewall
    Answer: b. Hybrid firewallsanfoundry
34. Firewalls commonly protect which perimeter?
    a. Physical office perimeters
    b. Network perimeters
    c. Password perimeters
    d. Print perimeters
    Answer: b. Network perimeterssanfoundry+1
35. Which kind of firewall inspects each packet in isolation?
    a. Stateful firewall
    b. Application-layer firewall
    c. Stateless firewall
    d. NAT firewall
    Answer: c. Stateless firewallonlineexammaker+1
36. What is a primary risk if a firewall is misconfigured?
    a. Enhanced security
    b. Network slowdown
    c. Unauthorized access
    d. Quicker password recovery
    Answer: c. Unauthorized accesssanfoundry
37. Firewall logs should be:
    a. Deleted weekly
    b. Ignored
    c. Reviewed and analyzed
    d. Publicly posted
    Answer: c. Reviewed and analyzedsanfoundry
38. Which service is least likely to be blocked by default by firewalls?
    a. Telnet (23)
    b. HTTP (80)
    c. FTP (21)
    d. SMTP (25)
    Answer: b. HTTP (80)sanfoundry
39. Purpose of proxy firewall is to:
    a. Log web activity
    b. Act as intermediary and inspect content
    c. Increase bandwidth
    d. Convert protocols
    Answer: b. Act as intermediary and inspect contentstudocu+1
40. In firewall terminology, “whitelisting” means:
    a. Denying all traffic
    b. Allowing specified traffic
    c. Stopping all access
    d. Removing users
    Answer: b. Allowing specified trafficonlineexammaker
41. Which is NOT a layer a firewall can operate on?
    a. Application layer
    b. Network layer
    c. Transport layer
    d. BIOS layer
    Answer: d. BIOS layerstudocu+1
42. A Next-Generation Firewall (NGFW) adds features like:
    a. MAC address spoofing
    b. Deep packet inspection, IPS, and app control
    c. Only stateful inspection
    d. Only port blocking
    Answer: b. Deep packet inspection, IPS, and app controlsanfoundry
43. Virtual firewalls are commonly implemented in:
    a. Hardware only
    b. Virtual environments/clouds
    c. Routers only
    d. Mobile phones
    Answer: b. Virtual environments/cloudssanfoundry
44. Which protocol is essential for VPN function in firewalls?
    a. HTTP
    b. IPsec
    c. FTP
    d. SNMP
    Answer: b. IPsecsanfoundry
45. In firewall parlance, a “blacklist” refers to:
    a. Allowed hosts/services
    b. Disallowed hosts/services
    c. All valid IPs
    d. Default policies
    Answer: b. Disallowed hosts/servicesonlineexammaker
46. Which firewall feature converts private to public IP addresses?
    a. URL filtering
    b. Virtualization
    c. NAT
    d. SSL offloading
    Answer: c. NATsanfoundry
47. Which log entry indicates a dropped connection?
    a. Success
    b. Accept
    c. Deny/Drop
    d. Allow
    Answer: c. Deny/Dropsanfoundry
48. Main purpose of a firewall DMZ:
    a. Speed up LAN
    b. Provide a neutral zone for public services
    c. Encrypt all packets
    d. Enhance WiFi range
    Answer: b. Provide a neutral zone for public servicesonlineexammaker+1
49. Firewalls in a layered security model are considered:
    a. Only physical security
    b. First line of defense at perimeter
    c. Only for endpoint protection
    d. Last resort security
    Answer: b. First line of defense at perimeterstudocu+1
50. Which is most essential to ensure continued firewall effectiveness?
    a. Logging history
    b. Regular updates and rule reviews
    c. Deleting all rules frequently
    d. Disabling monitoring
    Answer: b. Regular updates and rule reviewssanfoundry

1. https://www.sanfoundry.com/computer-networks-questions-answers-firewall/
2. https://www.gdcramban.in/MCQ/networkmcq.pdf
3. https://www.scribd.com/presentation/782541284/Firewall-Mcq
4. https://testbook.com/question-answer/what-is-a-firewall-in-computer-network–62888f864f8f3cc10ee5aded
5. https://www.studocu.com/in/document/heritage-institute-of-technology/aeie-b-tech/network-security-mcq-questions/70712702
6. https://www.sanfoundry.com/cyber-security-questions-answers-firewalls-1/
7. https://onlineexammaker.com/kb/30-firewall-quiz-questions-and-answers/
8. https://www.sanfoundry.com/introduction-to-firewall-in-computer-network/
9. https://www.uninets.com/blog/computer-networks-mcq
10. https://itexamanswers.net/5-3-2-firewall-technologies-quiz-answers.html
11. https://testbook.com/question-answer/firewall-is-a-type-of-___________–62bc14a0bdb1ee4fd8bd8524
12. https://www.scribd.com/document/738050902/New-Microsoft-Word-Document-2
13. https://www.scribd.com/document/199858371/Objective-Questions
14. https://wayground.com/admin/quiz/65c3c0eed9d55647d3448eed/firewall-and-its-types-quiz
15. https://edurev.in/test/7052/Test-Firewalls
16. https://testbook.com/objective-questions/mcq-on-networking–5eea6a1639140f30f369f551
17. https://www.quizmantra.com/2023/01/firewalls-mcq-quiz-network-security-quiz.html?m=1
18. https://www.yeahhub.com/top-20-frequently-asked-network-security-mcqs-with-answers/
19. https://testbook.com/question-answer/network-layer-firewall-works-as-a–62b19776fde0352f9f2fa5ce