Understanding OSI Model Layers 5, 6, and 7: Session, Presentation, and Application Layers

Plenty of attention is given to L1-L4 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
https://www.youtube.com/watch?v=LkolbURrtTs

OSI Model - Layer 4, Layer 5/6/7, Encapsulation De-Encapsulation
https://www.youtube.com/watch?v=0aGqGKrRE0g

In addition, I highly recommend watching my last video before or after watching the OSI model Layer 5, 6, and 7 video:
https://www.youtube.com/watch?v=ArXMa111x7A

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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 L5-L7 are often combined?
11:14 - Networking Models - Layers of Abstraction
12:30 - pracnet.net/networking
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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:

https://www.youtube.com/playlist?list=PLIFyRwBY_4bRLmKfP1KnZA6rZbRHtxmXi

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

https://pracnet.net/networking