National service providers (NSPs),private companies that own and maintain the worldwide backbone that supports the Internet.These include Sprint,Verizon,MCI (previously UUNet/WorldCom),AT&T,NTT,Level3,Century Link,and Cable & Wireless Worldwide.

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National service providers (NSPs),private companies that own and maintain the worldwide backbone that supports the Internet.These include Sprint,Verizon,MCI (previously UUNet/WorldCom),AT&T,NTT,Level3,Century Link,and Cable & Wireless Worldwide.

National Service Providers (NSPs),private Companies That Own and Maintain the Worldwide