From the developer: "The Boson Juniper practice tests will prepare you for the actual Juniper exam. This includes Juniper Networks Certified Internet Specialist JNCIS Exam. More exams are being added. Each practice exam contains over 200 questions and explanations and has a money-back guarantee.

"Each test in this download allows unlimited use of a 12-question database. Registration gives you use of 200+ questions, answers, explanations, and use of flash-card mode."

Note: Registration costs $39.95.