I just passed CompTIA Network+ N10-009 exam with 849 marks from New Jersey. In total I had 80 questions including the 6 PBQs. I don't have much of an IT background and studied for a month and a half. I used PassLeader N10-009 exam dump as my main study materials. For the PBQs: Understand routing tables and how to read their outputs. Know your command line tools. Understand logical layouts (where would you place a firewall, router, switch, AP, etc.). Understand WiFi configurations. Thanks PassLeader and good luck!