M

Mr. Dubey • 52.30K Points
Coach 

Q. A packet filter firewall filters at

(A) physical layer
(B) data link layer
(C) network layer or transport layer
(D) application layer
Correct : Option (C)

Explanation: 
 in computing, a firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules.

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