Which statement is true about the operation of Layer 2 VPNs?
A.
Layer 2 VPNs require that CE devices use the same Layer 2 encapsulation
B.
Layer 2 VPNs do not permit CE devices to operate a Layer 3 protocol with each other
C.
Service provider routers must evaluate the IP header of packets as they traverse their network
D.
Layer 2 VPNs allow CEs to use different encapsulations on either side of the VPN
Explanation:
http://www.juniper.net/techpubs/en_US/junos14.1/information-products/pathway-pages/config-guide-vpns/config-guide-vpns-layer-2.pdf
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