The MCI UUNet network spans more than 4,500 Points of Presence (PoPs) throughout North America, Europe and the Pacific Rim, and is arguably the world's top Internet backbone. MCI's IP network maintains high levels of reliability with redundant and diverse paths to avoid single points of failure and provide optimal routing and traffic flow. MCI's state-of-the-art Network Operations Centers provide pro-active network monitoring and fault resolution 24 hours per day, 7 days per week.