A.spanning-tree mode rapid-pvst B.spanning-tree uplinkfast C.spanning-tree backbonefast D.spanning-tree mode mst
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
A.a switch with a trunk link that is configured between the switches B.a router with an IP address on the physical interface that is connected to the switch C.a switch with an access link that is configured between the switches D.a router with subinterfaces configured on the physical interface that is connected to the switch