What is Port Security in Cisco? Port Security is a Layer 2 security feature on Cisco switches that limits which devices (MAC addresses) can connect to a switch port. 👉 Goal: Prevent unauthorized devices from accessing the network. Typical use case: • User access ports (PCs, printers, IP phones) • Prevent rogue laptops or switches ________________________________________ Key Rules of Port Security • Works only on access ports • Uses MAC addresses to identify devices • Can restrict, drop, or shut
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