I passed the exam with an overall score of 80%. This was the hardest exam I have sat for. The content here on Whizlabs will not prepare you for this exam. There are other posts that I used for guidance on the exam. I would google for pass aws networking specialty exam and you can find them. Specifically they will get you DNS documents and ReInvent youtube videos to watch, especially on Direct Connect.
On thing that I have not seen mention before is using the Wiley online quiz and exams that are available if you purchase the AWS networking specialty book. I found them to be very helpful for the type of questions that will be seen in the exam and overall content.
The questions on the exam are tricky and most times there are two answers that look right. Really focus on what the question is asking. Good Luck!