McqMate
| Q. |
A packet filter firewall filters at |
| A. | physical layer |
| B. | data link layer |
| C. | network layer or transport layer |
| D. | application layer |
| Answer» C. network layer or transport layer | |
| 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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