You have built a new facility and are now testing connectivity. All routers at the new facility can ping their directly connected neighbors, but cannot ping any other routers. Which statement is true?
A.
A layer 1 issue at the facility prevents all other layers from operating.
B.
Layer 1 is operational, but an issue with layer 2 causes frame errors.
C.
Layer 2 is operational, but layer 1 issues prevent packet forwarding.
D.
Layers 1 and 2 are working properly, but layer 3 needs more information to forward packets.