From the developer: "The Boson Nortel practice tests will prepare you for the actual Nortel exam. This includes Accelar Advanced, Advanced IP & Wan Protocols, NNCSS Router Core Technology, and NNCSS Switching Core exams. 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.