Two routers, R1 and R2, connect using an Ethernet over MPLS service. The service provides point-to-point service between these two routers only, as a Layer 2 Ethernet service. Which of the following are the most likely to be true about this WAN? (Choose two answers.)
- R1 will connect to a physical Ethernet link, with the other end of the cable connected to R2.
- R1 will connect to a physical Ethernet link, with the other end of the cable connected to a device at the WAN service provider point of presence.
- R1 will forward data-link frames to R2 using an HDLC header/trailer.
- R1 will forward data-link frames to R2 using an Ethernet header/trailer.
Explanation: The physical installation uses a model in which each router uses a physical Ethernet link to connect to some SP device in an SP facility called a point of presence (PoP). The Ethernet link does not span from each customer device to the other. From a data-link perspective, both routers use the same Ethernet standard header and trailer used on LANs; HDLC does not matter on these Ethernet WAN links.
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