Q7. What is a firewall in the context of computer networks?Computer — Information Network — Question 7 of 105A. A physical barrier designed to stop the spread of a fire.B. A network security system that monitors and controls network traffic to block unauthorized access.C. A type of antivirus software that detects and removes malware.D. A hardware device, like a router or modem, used for internet connectivity.Practice more Computer MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →