While you could attempt to pass the CCNA exam without any practice configuring and troubleshooting labs, we do not advise it. The CCNA is not an easy exam, especially if you are unprepared.
The CCNA syllabus covers a lot of practical skills along side the theory behind it, and the exam is designed to test your knowledge of this.
There are different ways you can get this practical experience, and we've put together a video explaining your options.
The video is part of the free trial of our online CCNA Success Bootcamp. To begin your free trial simply submit your name and email on our homepage.