Question: Suppose a small ISP X pays a larger ISP A to connect him to the rest of the Internet and also pays another ISP B

Suppose a small ISP X pays a larger ISP A to connect him to the rest of the Internet and also pays another ISP B to provide a fall-back connection to the Internet in the event that the loses connectivity via ISP A. If ISP X learns of a path to some prefix via ISP A, should he advertise that path to ISP B? Why or why not? (20pts)

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