Network+ Training Course Index: Professor Messer’s Course Notes: Discount exam vouchers: - - - - - We use the OSI model to describe application use, network activity, and troubleshooting tasks. In this video, you’ll learn about the layers of the OSI model and how they apply to real-world networking. - - - - - Subscribe to get the latest videos: Calendar of live events: Frequently Asked Questions: FOLLOW PROFESSOR MESSER: Professor Messer website: Twitter: Facebook: Instagram: LinkedIn: