Certified Information Systems Auditor (CISA) — Question 735

How does a switched network reduce the risk of network sniffing?

Answer options

• A. Switches can detect active packet sniffing devices in their subnet.
• B. Packets are not broadcasted throughout the whole subnet.
• C. Network traffic is generally reduced.
• D. Source and destination addresses are encrypted.

Correct answer: B

Explanation

The correct answer is B because switches direct packets only to the intended recipient rather than broadcasting them to all devices in the subnet, which limits exposure. Option A is incorrect as switches do not have the capability to detect sniffing devices. Option C is not directly related to reducing sniffing risk, and option D is incorrect because source and destination addresses are not encrypted in standard switched networks.