Enterprise network executives face several challenges in successfully migrating to advanced IP services. They must connect large, distributed organizations with optimized bandwidth to facilitate application performance. They must lower the number of circuits they support while dramatically reducing latency. They must respond to pressure to implement a voice over IP (VoIP) solution to add functionality and lower telecommunications costs, without any perceptible impact on the quality of the enterprise?s voice capabilities. They must also train and retain IT staff, often with insufficient budgets.