Consider 2 small ISPs Y and Z and two large ISPs A and B. Y pays A (but not B) to connect it to the rest of the Internet, while Z pays B (but not A) for its connectivity If ISP A learns of a path to some prefix via ISP B and ISP Z, should it advertise that path to ISP Y? Why or why not

Consider 2 small ISPs Y and Z and two large ISPs A and B. Y pays A (but not B) to connect it to the rest of the Internet, while Z pays B (but not A) for its connectivity If ISP A learns of a path to some prefix via ISP B and ISP Z, should it advertise that path to ISP Y? Why or why not

Principles of Information Security (MindTap Course List)

6th Edition

ISBN:9781337102063

Author:Michael E. Whitman, Herbert J. Mattord

Publisher:Michael E. Whitman, Herbert J. Mattord

Chapter6: Security Technology: Access Controls, Firewalls, And Vpns

Section: Chapter Questions

Problem 2RQ

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A network protocol is a collection of rules that governs the exchange of data between devices connected to the same network. In other words, network protocols are rules that specify how devices communicate or transfer data over a network. The sender and receiver systems must obey the standards to facilitate communication between them.

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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 he losses connectivity via ISP A. ISP X learns of a path to some prefix via ISP A, should he advertise that path to ISP B? Why or why not?
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