设备施工中驻站联络员要随时与现场防护员保持联系，若联系中断，现场防护员应立即通知施工负责人，在加强现场防护情况下，可继续作业。（）
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What is a key characteristic of the Cisco Business Ready Teleworker solution which is different from traditional software-client based Teleworker solutions?（）
A. all traffic is encrypted using IPSec and the Triple-DES algorithm
B. full support for all Enterprise applications, including data, voice, and video
C. thousands of Teleworker VPN tunnels can be aggregated to a headquarters location
D. the VPN tunnel is an always on site-to-site VPN connection
E. portability for use while traveling
F. used with broadband Cable/DSL subscriptio
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