Discussion
What is a stub network?
Answer: D
Correct answer: A network that has only one entry and exit point.
A stub network reaches the rest of the internetwork through a single point, so there is only one possible path in or out. Because no routing decision is available, it needs no dynamic routing protocol - a default route out of it and a static route into it are sufficient, which is why stubs are used to reduce routing overhead. A network with no exit at all would be isolated rather than a stub.
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