CCNP 642-813一些争议和疑问题目请考过的大哥确认

jiangc2008

小弟在看交换的题库时，同时看了V200和496的两套题库，发现有些答案是不一样。
请考完试的高手们看看下面几题的正确答案是什么?应该是选哪个？如果有参考资料的话发小弟一份，不胜感激！

拖图题：

1.Packet COS priority，此题有两种不同排序方案：

第一种：(496答案)
voice   call signalling  video interactive   video straming  networkment  ip routing
第二种：（v200答案）
voice  video interactive   video straming  call signalling ip routing networkment  

2.syslog priority(highest to lowest)，此题答案我不确定,视频里讲的答案与pdf中答案不一样：
第一种：
emergency  alert   critical   warning  notice  informational debug

第二种：
debug informational notice  warning  critical   alert   emergency  

选择题：
1.Which two statements correctly describe characteristics of the portFast feature?(choose two)
A. STP is disable on the port
B. PortFast can also be configured on trunk ports
C. PortFast is needed to enable port-based BPDU guard
D. PortFast is used for STP and RSTP host ports
E. PortFast is used for STP-only host ports
v200上的答案是CE ，496上的答案是BD，这题我查看过相关资料，BD应该是正确的，请大家再次确认

2.Refer to the exhibit.Assume that Switch_A is active for the standby group and the standby device has only
the default HSRP configuration. Which statement is true?


A. If port Fa1/1 on switch_A goes down,the standly device takes over as active
B. If the current standby device had the higher priority value,it would take over the role of active for the
HSRP group
C. If port Fa1/1 on switch_A goes down,the new priority value for the switch be 190
D. If switch_A had the highest priority number,it would not take over as active router
这道题V200中有，496中没有，V200给的答案是B，但是我认为是C，请大家确认！

3.Select an activity that is a recommended step in troubleshooting STP issues and Layer 2 loops.
A. identifying the loop
B. restoring connectivity
C. rebooting the root switch or secondary root switch
D. checking for bad hardware
E. checking for port errors
V200中给的答案是C，但是我认为应选E，请大家确认！

t568aa

以V200的为准   可以看看这个http://bbs.hh010.com/thread-106250-1-1.html

jiangc2008

顶起，求通过的人的正确答案