单项选择题
Assuming default setting,how can you erase the VTP database of VLANs on a CISCO IOS switch running in VTP server mode?（）
A. Enable VTP pruning B. From privileged mode ,erase the startup configuration file,then reload. C. From privileged mode ,erase the vlan date file, then reload. D. Cycle the switch power.
单项选择题 Which of these represents an IPv6 link-local address?（）
单项选择题 If an Ethernet port on a router was assigned an IP address of 172.1.1.1/20,what is the maximum number of hosts allowed on this subnet?（）
单项选择题 Which IPV6 routing protocol uses multicast group FF02::9 to send updates?（）
