CompTIA A+ Practice QuizRestartQuestion 16 of 20What is the main purpose of a firewall in network security?A.To monitor network traffic and block or allow data based on security rulesB.To connect multiple network segments physicallyC.To provide power over Ethernet (PoE) to devicesD.To convert analog signals to digital on a network← Back to StartNext →Ad space (AdSense): place your ad unit here.