Suppose an Internet service provider (ISP) has a voice over IP (VoIP) telephone system that it manages and sells. Suppose…

Suppose an Internet service provider (ISP) has a voice over IP (VoIP) telephone system that it manages and sells. Suppose further that this ISP is deliberately dropping 25% of the packets used in its competitors VoIP system when those packets are going through this ISP’s routers. Describe how a user could discover that his ISP is doing this.