I recently sat for the Wireshark Certified Network Analyst certification again. This will be the second time I have taken it and the second time I have passed. I have taken several various networking certification exams, networked with people who have sat for others, and read about many more. Keeping all of that in mind, I think this is one of the most straightforward certification tests I have seen. Laura Chappell, Gerald Combs, and the team have done a great job with the books and preparation materials.