Which switching mode provides the highest level of integrity and error-free transport, rather then maximizing speed?（）

A. BPDU
B. Port security
C. RSTP
D. STP
E. VTP
F. Blocking mode

A. The additions will create more collision domains.
B. IP address utilization will be more efficient.
C. More bandwidth will be required than was needed previously.
D. An additional broadcast domain will be created.
E. The possibility that switching loops will occur will increase dramatically.

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.