（）is the most flexible mode of all the transport modes.
第1题：
.We have arranged to go to the cinema on Friday, but we can be _______and go another day.
A)reliable B)probable C)feasible D)flexible
选D
A 可靠的，确实的 ，B 很可能的 C 可行的,可能的 D 灵活的
我们计划好了星期五去看电影，但也不是一成不变，另择他日也行。
第2题：
Refer to the network of Layer 3 switches in the exhibit. The RPI Multi cast Server only multicasts to hosts connected to multilayer switches 5 and 6. The CMU Multicast Server multicasts to hosts on multilayer switches 1 - 6. Given the number of configuration steps involved, what is the most efficient way to configure the net work while meeting the requirements for multicast data flow? （）
A. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode.Specify switch 1 as the root for the RPI Multicast Server. Specify switch 2 as the root for the CMU Multicast Server.
B. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode. Leave each multicast server as the root of its own multicast tree.
C. Configure each switch with PIM sparse - dense mode. Configure switch 3 as a ren dezvous point for the RPI multicast stream.
D. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode.Allow the switches to elect their own root for each multicast tree.
E. Configure each switch with PIM sparse mode.
F. Configure each switch with PIM dense mode.
第3题：
此题为判断题(对，错)。
第4题：
第5题：
A. FWSM routes traffic between the VLANs.
B. FWSM switches traffic between the VLANs.
C. Routed mode is often called bump-in-the-wire mode.
D. Routed mode firewall deployments are used most often in current designs.
第6题：
Wincc Flexible 的组件有Wincc Flexible 工程系统、Wincc Flexible 运行系统和Wincc Flexible工程系统选件和运行系统选件。( )
此题为判断题(对，错)。
第7题：
A. FWSM routes traffic between the VLANs.
B. FWSM switches traffic between the VLANs.
C. Transparent mode is often called bump-in-the-wire mode.
D. Transparent mode firewall deployments are used most often in current designs.
E. Traffic routed between VLANs is subject to state tracking and other firewall configurable options.
第8题：
A.MODEⅠ可以选择是否配置MPDCH，MODEⅡ不能配置MPDCH，MODEⅢ一定要配置MPDCH；
B.MODEⅠ必须配置MPDCH；MODEⅡ可以选择是否配置MPDCH，MODEⅢ不能配置MPDCH；
C.MODEⅠ不能配置MPDCH；MODEⅡ必须配置MPDCH；MODEⅢ可以选择是否配置MPDCH；
D.无论何种MODE，均可以不配置FPDCH；
第9题：
While intuitively ABS believes the most likely failure mode leading to the initial flooding of the starboard tanks was a combination of a weakened section of the vessel's structure，coupled with severe wave impact force，their analyses of potential factors could ______ the contribution of any of these．
A.prove
B.disprove
C.neither prove nor disprove
D.reveal
第10题：