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Which Carrier Ethernet service supports the multiplexing of multiple point-to-point EVCs across as a single UNI?
Correct Answer: B
Explanation/Reference: Explanation: Ethernet Relay Service (ERS or EVPL) An Ethernet Virtual Circuit (EVC) is used to logically connect endpoints, but multiple EVCs could exist per single UNI. Each EVC is distinguished by 802.1q VLAN tag identification. The ERS network acts as if the Ethernet frames have crossed a switched network, and certain control traffic is not carried between ends of the EVC. ERS is analogous to Frame Relay where the CE-VLAN tag plays the role of a Data-Link Connection Identifier (DLCI). The MEF term for this service is EVPL. Reference. http://www.cisco.com/c/en/us/td/docs/net_mgmt/ip_solution_center/5- 1/carrier_ethernet/user/ guide/l2vpn51book/concepts.html