Final answer:
To support a VoIP installation, QoS (Quality of Service) is the best option as it prioritizes voice traffic over other types of data transfers, which is essential for real-time communication.
Step-by-step explanation:
Supporting VoIP Installation
To best support a VoIP installation, the most suitable option would be A. QoS (Quality of Service). Quality of Service is a network feature that prioritizes different types of traffic to ensure that voice calls made over the internet receive the necessary bandwidth and are not interrupted by other less time-sensitive data transfers. This is crucial for VoIP, as voice communication requires real-time data transmission without delays or interruptions. Options B (POTS) refers to the traditional telephone system, which is unrelated to VoIP configuration. Option C (Wake-on-LAN) is a networking standard that allows a computer to be turned on or woken up by a network message, which is also not related to VoIP traffic. Option D (VPN) stands for Virtual Private Network, and while VPNs can carry VoIP traffic, they do not inherently improve VoIP performance without QoS.