单项选择题
A.Content networking
B.Campus local-area networking
C.Network management
D.Network security
多项选择题 As a TestKing instructor you are giving a lecture on the historical context of Cisco. You point out that a computer scientist started the Cisco Corporation. One of the attendants asks you when and where Cisco was founded. What should you respond? ()
多项选择题 Which three of these are benefits of telepresence and video collaboration?（）
单项选择题 Wide Area Network (WAN) is a computer network that covers a broad areA. Which statement is correct for wide-area network (WAN)?（）