Tls which osi layer

Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.

Please download a browser that supports JavaScript, or enable it if it's disabled i. So which is it? Don, It's funny you should ask that. I asked the same exact question to Adam when we were filming that episode. However, Adam told me that for the exam the viewers need to associate it with Layer 4. So if Vendor A claims that they sell a Layer 4 device, then vendor B can also say that our product uses Layer 4 information so it would be able to interoperate with Vendor A.

It was not designed to say that "ip operates at Layer 3". It was designed to say that if you claim to support Layer 3 protocols such as IP you must also support layer 1 and layer 2 protocols. So that if Vendor A sells routers and Vendor B sell switches, you should be able to connect these two together.

Of course this also meant that we had to try and categorize which layers certain protocols would mainly operate within, but the purpose of the OSI-model was not to classify where protocols operate!

I think you are threading into deep water here because in general depending on how you look at things, you will get different answers to a question like that. My personal oppinion is that if we really must be able to match a specific protocol to a specific layer in the OSI-model it's just a model, nothing is written in stone then we need to consider at which layer the forwarding decision is made.

Wherever that decision is made, that's the layer it will be operating within. The problem with your question then becomes - how to identify where the forwarding decision is made? Well, there's just a lot to consider when using multiple protocols and tunnel them over a transport-protocol.

This is just one of those examples which will help you realize that the OSI-model is just a model and is actually It just doesn't work that way. As you can see, we have a lot of information to consider here that would place it at anything between Layer 4 and 7.

If i would have to pick one layer to place this in and i think it's wrong to place it in a single layer , i would pick Layer 5. Because that's where the forwarding decision is made. To break it down Juergen correct me if im wrong :. But without a successfull negotiation and handshake at the Session layer, there would be no encryption and the tunnel would never be setup.

It all ties together and depends on a successfull L5 handshake. Besides remembering the basics of the features of each OSI layer as in Table , and some example protocols and devices at each layer as in Table , you should also memorize the names of the layers. You can simply memorize them, but some people like to use a mnemonic phrase to make memorization easier. In the following three phrases, the first letter of each word is the same as the first letter of an OSI layer name, in the order specified in parentheses:.

If i get such an answer and i would not be sure which layer , i would try to eliminate the answers, that are most unsuitable and continue that process until only one answer remains. With multiple choice questions, that is often possible and in my opinion a good strategy for exams.

After the Transport layer, all the applications, and their encryption protocols are all mushed up. The T ransport L ayer S ecurity protocol. TLSP seems to be a very obscure protocol. And it was registered in This was before the protocol that we now commonly refer to as "TLS".

Back in that day, the protocol was still called "SSL". The first public draft for "TLS" is dated two years later, on That name does not ring a bell for me. The bull. I'm guessing that's the guy that once submitted the "TLSP" registration. And also that he's the only one who can tell you what "TLSP" really was. Nobody has used Kryptonet key management for years.

Communication packets are not processed generically based on their contents. The server expects packets to be in the correct protocol from the get go. Transport Layer as the name indicates. And that is Transport Layer. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Learn more. What layer is TLS? Ask Question. Asked 6 years, 4 months ago. Active 1 year, 8 months ago. Viewed 64k times. Improve this question. Andrew Spott Andrew Spott 1 1 gold badge 7 7 silver badges 8 8 bronze badges. Related: Where does SSL encryption take place? Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Skip to main content.

This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode.