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Summary

Underlying optical technologies such as SONET/SDH, CWDM, DWDM, and RPR enable the service provider to provide advanced WAN services such as storage, content switching, web hosting, instant messaging, and security built on an Ethernet framework.

Service providers use Metro Ethernet and MPLS VPNs as a flexible transport architecture to offer high-speed WAN Ethernet services such as transparent LAN services to support enterprise customers.


  

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