Session Sensation: An IT Admin's Guide to OSI Layer 5

OSI layer five is a complex but remarkably interesting layer where protocols like RPC, Winsock and many more exist and run. Layer 5 is about synchronization of data, establishing, maintaining, and ending communications. You will learn about H.245, iSNS, SMB, RTCP, and another layer five protocols. We will explore how Windows 10 implements layer five. We will use tools to view and expose protocols operating at Layer 5. Enjoy learning some new concepts in Layer 5.

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[basavarajchougala]

Dear Sir,

The Brilliant Heartily Thank you.

The way of Explanation is very nice and very understandable.

Basavaraj, From India.

[TheCorei]

You are Sir, simply amazing .. lots of love and thanks.

[sirpuddinlot]

Thank you! this was very insightful for me since I've only just started on learning the osi model concepts

[zaur]

This was really really really well explained. Thank so much for your time and effort on this!

[evolagenda]

So layer 4 is the delivery mechanism i.e. it's going to create 2 numbers on either side of the internet and each side will agree to talk until terminated it doesn't "care" about the data but layer 5 is like an extra delivery / synchronization mechanism that rides layer 4 and does care about the data. Layer 5 specifically deals with data and as a result "user experience". From client/server perspective i.e. its "controllable", since layer 5 is in user space you can write a client server architecture that does very specific things and expects very specific things based on a session behaviour as it's essentially the backend to a layer 7 protocol. Whereas with layer 4 you don't really have a choice beyond some kernel tunables it's just going to do its thing. Which all makes a lot of sense you think about using udp as a transport mechanism.

[geeteshvyas]

amazing hats off you , thank you so much

[alittax]

Hello Professor Vanderpool. I've got a practical question on Layer 5. If I open Chrome and log in to my YouTube account, and then I open a private browser via Chrome and log in to my friend's YouTube account, then does the Session layer distinguish between data that is sent to and from those two different types of Chrome browser windows? Have a nice day.

[polartechie]

Bacon bits
Frying frames
Produces packets
Salivation segments