Virtual Private LAN Services (VPLS) Is a Class of VPN

question 157

Multiple Choice

Virtual Private LAN Services (VPLS) is a class of VPN that supports the connection of multiple sites in a single bridged domain over a managed IP/MPLS network. VPLS presents an Ethernet interface to customers, simplifying the LAN/WAN boundary for Service Providers and customers, and enabling rapid and flexible service provisioning, because the service bandwidth is not tied to the physical interface. Which of these statements best describes VPLS?

• A) Neither broadcast nor multicast traffic is ever flooded in VPLS.
• B) Multicast traffic is flooded but broadcast traffic is not flooded in VPLS.
• C) VPLS emulates an Ethernet switch, with each EMS being analogous to a VLAN.
• D) Because U-PE devices act as IEEE 802.1 devices, the VPLS core must use STP.

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