Comcast employs [[w:packet shaping|packet shaping]] on both residential and "business-class" customers, which previously led to an FCC investigation,.<ref>https://www.nytimes.com/2008/01/09/business/media/09fcc.html?_r=2&ref=technology&oref=slogin& FCC investigation</ref>. In 2010, Comcast published an RFC on their new packet shaping practices, which results in the customers using the most traffic being given the least priority.<ref>https://tools.ietf.org/html/rfc6057</ref> This is extremely problematic, as users must limit their ''downstream'' bandwidth, which is extremely difficult. Some users have reported average ping times to Google on the order of 1800 ms as a result, which have partially been alleviated by [[w:Quality of service|QoS]] scripts on their routers.