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Propagation delay depends on ___________(a) Packet length(b) Transmission rate(c) Distance between the routers(d) Speed of the CPUI got this question in an internship interview.This interesting question is from Delays and Loss topic in portion Security & Physical Layer of Computer Network

Answer»

The correct answer is (c) Distance between the routers

To explain: Propagation delay is caused when the packet is in its electric signal form and is travelling through a MEDIUM (a wire or a electromagnetic WAVE). Propagation delay is the time it takes a bit to propagate from one router to the NEXT. If the distance between the routers is increased, it will take LONGER time to propagate, that is, there would be more propagation delay.



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