Can the AWS Certified Advanced Networking Specialty exam be legitemately passed with only a few weeks of studying? Yes.
Is there a secret shortcut? No.
Although there is no shortcut, I will discuss my previous experience, study materials, and general impressions of the exam. If you have already been working with AWS networking, and wondering what it takes to be certified, this post should give you a pretty good idea. Regarding my timeline, I passed the AWS Certified Solutions Architect