单项选择题

A service provider wants to prevent the repeat of a denial of service (DoS) attack that recently disabled Internet access for several thousand customers. Which Cisco solution best matches this business need?（）

A.Network security
B.Wireless network
C.Content networking
D.Virtual Private Network (VPN)

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多项选择题

You are the network consultant from passguide.com. In which situation you will advice your customer to implement data centers?（）

A.Protecting the business from information outages
B.Optimizing the efficiency with which IT operates
C.An increased need for specialized IT silos
D.IT systems grow fast

单项选择题

What is a benefit of Internet protocol (IP) telephony?（）

A.Synchronizes password exchanges for call setup
B.Eliminates the need for physical cabling in a TCP/IP network
C.Enables two-way voice transmission over a packet-switched TCP/IP network
D.Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network