A firewall is no longer just a box—it's a policy enforcement engine. In this deep dive, Sec Guy explains why WAFs have evolved into WAAPs to stop API attacks, why VPNs are being replaced by ZTNA and SASE, and how to use "Sticky MAC" and 802.1X to lock down your physical ports. If you are prepping for Security+, CISSP, or CCSP, this is your masterclass in network defense.

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