What are the two types in the WDM system? What is a DWDM network and System Components? How many channels are supported by DWDM? Why C band is used in DWDM? Supporting Optical networks: What indications would you receive that an optic is failing? If an EDFA is in a saturated state what are the steps to clear this? What is attenuation? Supporting Layer2 (Metro Ethernet, ethernet): What is the difference between and EPLINE and EVPL? Explain Spanning tree? What it is used for and how it functions. Supporting MPLS and Layer 3: What are the major components of an MPLS network? Define BGBP ISIS and OSPF? If a BGP route was consistently bouncing how would your resolve this issue?
