CCNA Port Security Practical Lab | Shutdown vs Protect vs Restrict In this video, I explained Cisco Switch Port Security using a real Packet Tracer lab. You will clearly see shutdown, protect, and restrict modes with a hacker PC test. This practical CCNA 200-301 lab helps beginners understand switch security in easy words. CCNA port security Cisco port security shutdown protect restrict switch security lab CCNA practical lab Packet Tracer port security networking security basics Cisco switch con