A mid-sized company serving an international market had its long-distance calling abilities suspended by its
telecom provider after incurring charges for long-distances calls that increased 4000% within a time span of two weeks. While investigating the spike in usage, the IR team discovers the changes ae related a pool of five numbers commonly used for public webinars and international client conferences calls. The IR team also discovers the lines are being used after hours by multiple parties in countries where the company does not have clients. As part of the lessons learned, the IR team must harden the current conference bridge configuration. Which of the following configuration settings will reduce the risk of future incidents?
A. Play hold music in call lobbies to prevent conversations
B. Limit the number of attendees allowed for each call
C. Prevent conference call from starting until the host provides a PIN
D. Restrict the calls to allow domestic phone numbers only
E. Automatically disconnect all callers after the call is active for more than 60 minutes
Prevent conference call from starting until the host provides a PIN This will have a better audit of the calls made. ... View the full answer