The US House of Representatives last week rejected proposals that would have let internet service providers block legal content but allowed rationing for bandwidth hogs.
Verizon is suing the Federal Communications Commission (FCC), arguing that it overstepped its authority in proposing the rules. The FCC voted in December to ban ISPs such as Verizon from blocking traffic but said they could "shape" traffic.
Research shows that a few internet users take up a large proportion of bandwidth, and they are chiefly responsible for network congestion.
However, network operators, especially mobile network operators, want the right to run a two-tier internet because it allows them to charge more for either or both of content and quality of service.