多项选择题
What are two security appliances that can be installed in a network?（）
A.ATM B.IDS C.IOS D.IOX E.IPS F.SDM
多项选择题 Which of the following describes the roles of devices in a WAN?（）
多项选择题 Switch ports operating in which two roles will forward traffic according to the IEEE 802.1w standard?（）
多项选择题 Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN?（）
