Certified Information Systems Security Professional (CISSP) — Question 349

Which is MOST important when negotiating an Internet service provider (ISP) service-level agreement (SLA) by an organization that solely provides Voice over
Internet Protocol (VoIP) services?

Answer options

• A. Mean time to repair (MTTR)
• B. Quality of Service (QoS) between applications
• C. Financial penalties in case of disruption
• D. Availability of network services

Correct answer: D

Explanation

The most crucial element in this context is the availability of network services, as uninterrupted service is vital for VoIP functionality. While MTTR, QoS, and financial penalties are important, they do not directly ensure the continuous operation of VoIP services like availability does.