During STP calculation, the port cost is associated with the port bandwidth by default. Which of the following statements about the relationship between port cost and port bandwidth is true?
Answer : B
If Proto of a route displayed in the routing table is OSPF, the preference of the route must be 10.
Answer : B
Which of the following protocols is not a file transfer protocol?
Answer : D
When a switch port receives a frame that does not carry a VLAN tag, it must add a PVID to the frame.
Answer : B