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

Question
What is the function of a firewall in a network?
A. To allow or block network traffic based on rules
B. To assign IP addresses
C. To route packets
D. To resolve domain names
Answer: Option A
Solution (By JKSSB Mock Tests)
A firewall filters network traffic based on security rules to protect the network.
This question belongs to: Computer Computer Networking
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Question #1
Which of the following is an IP address reserved exclusively for use within private internal networks?
A. 200.200.200.200
B. 192.168.1.50
C. 8.8.4.4
D. 172.32.1.1
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Correct Answer: Option B

Explanation:
The 192.168.0.0 to 192.168.255.255 range is defined by RFC 1918 as a private Class C IP block reserved for internal networks.
This question belongs to: Computer Computer Networking
Question #2
Which system assigns dynamic, temporary IP addresses automatically to client workstations whenever they connect to a local area network?
A. DHCP
B. NAT
C. DNS
D. ARP
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Correct Answer: Option A

Explanation:
DHCP (Dynamic Host Configuration Protocol) automates the allocation of IP addresses, subnet masks, and gateway pointers to connecting clients.
This question belongs to: Computer Computer Networking
Question #3
What condition occurs on a shared bus network if multiple stations attempt to transmit data frames over the backbone line simultaneously?
A. Data Collision
B. MAC address duplication
C. Signal termination bypass
D. Automatic loopback routing
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Correct Answer: Option A

Explanation:
Data collisions occur when multiple devices transmit signals over a shared electrical medium simultaneously, garbling the data frames.
This question belongs to: Computer Computer Networking
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