[EXAM][TK][604]TK勘误表

rs6000_cn

交换机默认情况下，IP SNOOPING和CGMP都是禁用的

newguy

诸位大侠我有不少问题，俺是个paper，好多问题都不理解，请给俺讲讲,一下是问题连接
http://www.itpub.net/showthread.php?s=&threadid=68334

PatrickJ

请教：为何下面这道题选A？？？

NO: 230
All ports in the diagram have the same spanning-tree cost and all ports are configured as access ports. You want to use the UplinkFast feature to improve convergency time after a link failure. Where in diagram should you configure the UplinkFast feature to best achieve this?
A: Switch TK1
B: Switch TK2
C: Switch TK3
D: Switch TK4
Answer: D
正确的应该是A

PatrickJ

下面两道题的答案是不是也错了：

NO.1：How does the Layer 2 switch use CGMP to limit multicast traffic?
A. Vlans are defined to correspond to the boundaries of the multicast group.
B.The switch discovers if there are still members of the group remaining on the network segment.
C.The switch periodically transmits queries to multicast hosts to refresh its knowledge of the group membership.  
D.The same switch keeps sending Group-Specific-Queries until the time-out.
Answer: C（答案应该是B吧？？？）

No.2：IGMPV2 clients are able to immediately remove themselves from a multicast group. The procedure for IGMPv1 clients is somewhat different. Which of the following statements concerning IGMPv1 clients is valid?
A. They leave a multicast group without sending any notification
B. They leave a multicast group after sending an IGMP Leave message
C. They leave a multicast group by sending a unicast message to the router
D. They leave a multicast group by stopping the periodic heartbeat message to the router
Answer: D （答案应该是A吧？？？）

eagle_zxs

22应该是A、D啊，怎么是C、D呢？

eagle_zxs

22看来还是应该选C、D，呵呵，搞错了！！！

rs6000_cn

这么古老的帖子还被翻出来了，算算都快一年了，时间过得可是真快呀