Ensure performance and prioritizing data on the Internet may seem nearly impossible because of the increased number of variables that can affect and damage the service. * Includes valuable insights from a Bell Labs engineer with 14 years experience in data networking and Internet protocol design. * Details of enhancements to the current Internet architecture and discuss a new mechanism and network management capabilities that QoS will require. * Focus on four main areas of Internet QoS: integrated services, differentiated services, MPLS (Multiprotocol Label Switching), and traffic engineering.