CCIE Certification Exam Question:
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Explain What is the purpose of automatic gain control (AGC) in EDFA?
A. Compensates gain tilt
B. Balances transient power
C. Serves as a variable optical attenuator
D. Serves as a substitute to gain flattening filter

Answer:

B.Balances transient power

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CIDR is primarily used select one:
A. In BGP only
B. For classless routing
C. In OSPF only
D. In EIGRP only		Which two operational states can PVCs be in? (multiple answer)
A. Data transfer
B. D
C. Shut