Why would a network administrator configure port security on a switch?（）

• A、To prevent unauthorized Telnet access to a switch port.
• B、To limit the number of Layer 2 broadcasts on a particular switch port.
• C、To prevent unauthorized hosts from accessing the LAN.
• D、To protect the IP and MAC address of the switch and associated ports.
• E、To block unauthorized access to the switch management interfaces over common TCP ports.