Which mechanism protects private networks from outside attack?

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Multiple Choice

Which mechanism protects private networks from outside attack?

Protecting a private network from outside attack centers on controlling what traffic can enter and leave. A firewall acts as a barrier at the network boundary, inspecting and filtering traffic based on defined rules. It can block unauthorized access, drop suspicious packets, and permit only trusted communications, making it the primary defense against external threats. Antivirus protects individual devices by detecting malware after it arrives or executes, not by guarding the network boundary. Digital signatures verify the origin or integrity of a file or message, but they don’t regulate network traffic. Formatting is a data-storage operation with no role in guarding networks.

Protecting a private network from outside attack centers on controlling what traffic can enter and leave. A firewall acts as a barrier at the network boundary, inspecting and filtering traffic based on defined rules. It can block unauthorized access, drop suspicious packets, and permit only trusted communications, making it the primary defense against external threats.

Antivirus protects individual devices by detecting malware after it arrives or executes, not by guarding the network boundary. Digital signatures verify the origin or integrity of a file or message, but they don’t regulate network traffic. Formatting is a data-storage operation with no role in guarding networks.

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