因正当防卫造成损害的（）。A．不承担责任B．承担必要的责任C．由第三人承担责任D．承担公平责任

A. Features such as UplinkFast and BackboneFast are compatible with RSTP.

B. An RSTP that is based on Cisco products generally performs better than the Cisco proprietary 802.1D enhancements.

C. Cisco proprietary enhancements are not transparent.

D. Information about port roles is sent to all switches.

E. RSTPs that are based on Cisco products require no additional configuration.

A. RSTP cannot operate with PVST+.

B. RSTP defines new port roles.

C. RSTP defines no new port states.

D. RSTP is a proprietary implementation of IEEE 802.1D STP.

E. RSTP is compatible with the original IEEE 802.1D STP.

A．blocking

B．learning

C．disabled

D．forwarding

E．listening

A．Shared

B． Point-to-Point

C． Designated

D． Multiaccess non-broadcast

A．VTP

B．802.1Q

C．RSTP

D．STP

A. Lower preference values are more preferred than higher preference values.

B. You can modify the default preference values for any of the routing information sources.

C. By default, a static route is more preferred than a RIP route.

D. A static route is always preferred over a direct route.

In the meantime, consumers are forced tomake a choice betweenjust two US and two UK airlines, which provide 95 percent of transatlantic services from Heathrow.

A.RSTP cannot operate with PVST+.

B.RSTP defines new port roles.

C.RSTP defines no new port states.

D.RSTP is a proprietary implementation of IEEE 802.1D STP.

E.RSTP is compatible with the original IEEE 802.1D STP.

He was given two alternatives and he preferred the ______ to the latter.

A．previous

B．prior

C．former

D．initial