How do insertion loss and return loss differ when evaluating a fiber connection?

How do insertion loss and return loss differ when evaluating a fiber connection?

• A. Insertion loss is forward power loss through the connection; return loss is the power reflected back to the source.
• B. Insertion loss is the reflected power; return loss is forward loss.
• C. Insertion loss and return loss are identical measures.
• D. Return loss measures the total power transmitted.

Answer: (A)