I shoot yesterday the CCNP switch exam and it was very difficult.
Some questions were out of the official book.
So it would be very good if there are good advices in forums.
I do not work as a network engineer and I am planning to take the Route exam.
Is it possible with only GNS3?
The harder the exams, the greater the reward, isn't it? Yes, it is entirely possible to use GNS3 to prepare for ROUTE. Make sure you have the right IOS images and you're good to go. Congrats, and best of luck on your next one.