I have four routers connected like a hub on spoke topology. The central router is Denver and is connected to LA, Houston and Miami by serial links. All have their connected interfaces correctly configured. Static routes are configured : Denver has a static route to each ethernet subnet on Miami, LA and Houston. These three routers have a default route to Denver (See configuration on the attach file).
The question is :
Can a host in Miami ping the serial interface S0 in LA. (Assume that the serial S0 of LA is connected to Denver and denver is connected to Miami)
The book's author answer NO.
But i think yes, because the default route for Miami is to sent its packets to Denver, and as it is directly connected to LA, it can forward the packet toward the S0 interface of LA. Then LA can reply to denver which is directly connected.
Finally, as static routing is configured on this last router it can forward the packet to the destined host via Miami.
Help me fix that.
I draw a map and attach. Should you need to see the topology.
You are quite right on your analysis about the author's errors. The next-hop address could be a typo, the answer should be YES, and the reason that the author gives you is explaining why the answer is YES rather than NO.
You are doing well on analyzing questions like this one, and such an abliltiy is very important and helpful to answer question on real exam. But, please remember, there is very few typos or errors you can find in the real exam. If there is a wrong ip address, that is a wrong ip address. Base on that information to analyze the question and choose the best answer accordingly.
Please also notice the time you spend for each question. Don't spend too much time on a tricky question like this. Try to complete all the questions before the time is over. You might loose one or two tricky questions, but you still have a good chance to pass the exam.