1. IGMP 侦听在Catalyst5000交换机上默认是不是打开的?
2. 在干道链路上如果要删除Certain VLANs,用Set Vlan还是 ClearTrunk?
3. In which transmission method are frames replicated as needed?
A. Unicast
B. Multicast
C. Simulcast
D. Broadcast
Answer: A.
我觉得:1. 默认应该是Enable的
2. 我觉得应该是clear trunk,set vlan的话好象把所有的VLANs都清除掉了.
1. igmp used by route processor, after cisco ios v11.? default setting is igmp v2.
2. both answers are wrong. u should use command clear vlan vlan-# to delete Certain VLAN; clear trunk will delete the trunk for any vlan.
3.replicated=copied, only unicast uses copied frame for different clients; multicast and broadcast only send one frame for their different clients; if the message is made by one frame.