What are two recommendations for protecting network ports from being exploited when located in an office space outside of an IT closet?

What are two recommendations for protecting network ports from being exploited when located in an office space outside of an IT closet? (Choose two.)
A. enable the PortFast feature on ports
B. configure static ARP entries
C. configure ports to a fixed speed
D. implement port-based authentication
E. shut down unused ports

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