单项选择题
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.
A.they run a spell check on host names to ensure accurate routing B.they map individual hosts to their specific IP address C.they convert domain names into IP address D.Given an IP address，they determine the name of the host that is…
A.无线网络使用WEP或WPA/TKIP是非常安全的，不容易受到黑客攻击 B.无线网络使用WPA2/AES应该有至少6个字符的密码短语 C.如果IPSec VPN是可用的，那么在任何公共无线LAN中部署它 D.如果无线接入不是必须的，禁用无线设备或无线NIC