Port security  in ccna cisco packet tracer:-
ü  Is a feature which helps administrator to protects his internal network:-
ü  Port security remembers the current connected mac address of system to that port.
ü  Allow only that mac address to communicate on that port.
ü  If any other mac address of other nic tries to communicate with it it get shut down or disable  and another mac address get unable to communicate.
v  Port security rules:-
ü  Violation, shutdown, restrict, protect.
ü  Shutdown-by default port get shutdown if any changes were made.
ü  Restrict-get info  to the administrator of network.
ü  Protect-we can also specify any port number or mac for any system so it will works only that port mac.

v  Agar Kisi port pe Kisi mac address ya ip address Ki info dal rakhi hay to uspey bs whi kaam kareyga  aur baki shutdown ho jaengey. 

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