Firewall is used in PC for
Last updated May 30, 2026
Correct Answer:
Option A —
Security
Understanding the Role of a FirewallA Firewall acts as a protective barrier between a trusted private network (like your personal computer) and untrusted external networks (like the internet).
Primary Function: Its main purpose is Security. It monitors and filters incoming and outgoing network traffic based on an established set of security rules. It blocks unauthorized access, hackers, and malicious traffic while allowing safe communication to pass through.
Why not (B) Authentication? Authentication (verifying the identity of a user, e.g., via passwords or OTPs) is handled by identity management systems or protocols, not by the firewall itself.
Why not (C) Data transmission? Data transmission is the job of networking hardware and protocols like routers, switches, and TCP/IP. A firewall only inspects or blocks this transmission; it does not facilitate it.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
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