Plenty of attention is given to L1L4 of the OSI model... but very little attention is given to the Session Layer, the Presentation Layer, and the Application layer (Layers 5, Layer 6, and Layer 7). That's led to a lot of bad information existing about these three errors. So I decided to create a video that explained how these three layers work, and how they contribute towards the goal of Networking: sending data between two computers.

This video can be considered a follow up to my first two videos on the OSI model:

OSI Model Layer 1, Layer 2, Layer 3
   • OSI Model: A Practical Perspective  ...  

OSI Model Layer 4, Layer 5/6/7, Encapsulation DeEncapsulation
   • OSI Model: A Practical Perspective  ...  

In addition, I highly recommend watching my last video before or after watching the OSI model Layer 5, 6, and 7 video:
   • HTTP vs HTML: Unveiling Network Proto...  


00:00 Intro
00:42 OSI Model, TCP IP Model, Four / Five / Seven layer models
02:00 Layer 5 Session Layer
04:06 Session Layer Modern Example: HTTP Cookies
06:04 Layer 6 Presentation Layer
07:38 Presentation Layer Modern Example: ASCII encoding
08:19 Layer 7 Application Layer
09:34 HTTP vs FTP protocols implement L5, L6, L7 independently
10:43 Why L5L7 are often combined?
11:14 Networking Models Layers of Abstraction
12:30 pracnet.net/networking


If you want a full training series unpacking Networking Fundamentals and how Data moves through the Internet, check out Module 1 of the course which is available for free on Youtube:

   • Networking Fundamentals  

And if you enjoyed that series, consider the expanded course based on this series covering the full depth of Networking:

https://pracnet.net/networking