An important limitation of the Cisco Business Ready Teleworker solution is_____.（）
A. IP phone extensions for teleworkers must be chosen carefully so not to duplicate campus phone extensions.
B. More security exposure exists due to lack of support for Intrusion Detection System and URL filtering for teleworker originated traffic.
Compressed RTP and IPSec are not compatible and result in no bandwidth savings.
D. Broadband modems must support Quality of Service for adequate voice quality.
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