单项选择题
Which enterprise caching mode eliminates the need for Layer 4 switches or WCCP enabled routers to intercept user requests?（）
A. transparent B. proxy C. reverse proxy D. direct
多项选择题 Which three Layer 2 access designs have all of their uplinks in an active state?（）
多项选择题 Which three objectives would be met by designing Layer 3 switching in the Campus Backbone of a medium size installation?（）
多项选择题 WhichthreeLayer2accessdesignshavealloftheiruplinksinanactivestate？（）
