Exam 200-310 Question id=291 Considerations for Expanding an Existing Network

When considering the three VoIP design models - single site, centralized multisite, and distributed multisite - which question below would help to eliminate one of
the options?

A. Will the switches be required to provide inline power?
B. Will users need to make offsite calls, beyond the enterprise?
C. Will users require applications such as voice mail and interactive voice response?
D. Are there users whose only enterprise access is via a QoS-enabled WAN?

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