单项选择题
You are the network administrator for passguide.com. Which device will you install in your computer to make wireless connections you and a network?（）
A.Repeater
B.Wireless router
C.Hub
D.Wireless network adapter
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多项选择题
You are the network consultant from passguide.com. Do you know what attacks are software based attacks that disable your computer and attack user by e-mail? （）
A.Executable
B.Trojan
C.Virus
D.Worm -
单项选择题
Telepresence and video conferencing have been an increasingly important component of the overall collaboration marker, which indicator is the best measure of the continued importance of these technologies going forward?（）
A.generation Y ,raised on video, comprises 17 percent of the world population
B.the annual growth rate of the video-conferencing market is 23 percent
C.the U.S internet traffic annual growth rate is more than 40 percent
D.thecisco long-term growth-rate target is 12 percent to 17 percent -
单项选择题
Which wireless technology would A customer choose to position them for bandwidth-intensive applications?（）
A. 802.11x
B. 802.11a
C. 802.11n
D. 802.11g
