地。而feasible successor 则是successor的备份的路径,如果successor路径出了问题,就立即将feasible successor路径转为successor路径转发数据。
165.Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
A. Full-duplex Ethernet consists of a shared cable segment. Half-duplex Ethernet provides a point-to-point link.
B. Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex Ethernet uses a jam signal.
C. Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth.
D. Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive.
166.Which are valid modes for a switch port used as a VLAN trunk? (Choose three.)
解释一下:将链路配置为trunk模式可以通过几种协商模式来完成:auto , desirable , on ;也可以通过静态指定trunk来强制一条链路为trunk。
167.Refer to the exhibit. A problem with network connectivity has been observed. It is suspected that the cable connected to switch port Fa0/9 on Switch1 is disconnected. What would be an effect of this cable being disconnected?