What is the purpose of a firewall in network security? MCQ with Answer and Explanation

What is the purpose of a firewall in network security?
A. To speed up internet connection
B. To block unauthorized access to a network
C. To enhance graphic display
D. To store backup files
Answer: Option B
Solution (By JKExamLibrary)
A firewall monitors and controls incoming and outgoing network traffic based on security rules.

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Question #1 Report Error
What is the primary function of a modem?
A. Store data
B. Display output
C. Process data
D. Convert digital to analog signal

Correct Answer: Option D


Explanation:
Modem modulates and demodulates signals.

Question #2 Report Error
The first woman in space was:
A. Peggy Whitson
B. Valentina Tereshkova
C. Sunita Williams
D. Kalpana Chawla

Correct Answer: Option B


Explanation:
Valentina Tereshkova flew in 1963.

Question #3 Report Error
Which launch vehicle is used for Chandrayaan missions?
A. LVM3
B. Both B and C
C. GSLV
D. PSLV

Correct Answer: Option B


Explanation:
Different launch vehicles were used for Chandrayaan series.