Timeline for OSI Model and Networking Protocols Relationship
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 18, 2020 at 3:24 | comment | added | Jeff Learman | Session layer is about picking up where you left off (and a lot of other things like that, but establishing context in terms of time and sequence.) Presentation layer is about exchanging data without worrying about how it's encoded on the wire (e.g., big-endian vs. little-endian.) | |
| Dec 18, 2020 at 2:58 | comment | added | Jeff Learman | This is the standard treatment of the OSI model. It's a good starting point, but completely fails for lots of cases that I've implemented, because many things do not fit neatly in one layer. What layer is PPTP in? | |
| Feb 20, 2014 at 16:24 | comment | added | Ron Trunk | @JohnJensen That is true. I don't use it often enough to remember that ;-) | |
| Feb 20, 2014 at 16:19 | comment | added | John Jensen | @Ron, ISIS is not a native IP protocol. OSPF is. (Just to add more confusion. :-) ) | |
| Feb 20, 2014 at 12:14 | comment | added | mulaz | OSI model is just a theoretical model. Even if routing protocol <name here> uses (L2|L3) packets, it is also a part of L7, since it's an application, and it has to calculate the routing table, and maybe same layer inbetween. Not everything is black and white. | |
| Feb 20, 2014 at 11:44 | comment | added | chris | I wouldn't want to argue which protocols is best suited on each layer, but I think we are undermining the importance of the OSI model, similar to the hierarchical model (access,distribution,core layer), The OSI model is a systematical representation of how the "internet" works. From layer one where a user opens his computer until his device acquires an IP address then routes to the WAN to his destination website served by the GUI, and this GUI came from the codes created by html,css,javascript. It represents how the data travels from its source to the destination network. | |
| Feb 20, 2014 at 11:23 | comment | added | Ron Trunk | Chris, I appreciate your answers, and to a large extent, you are correct. But ISIS runs on top of IP, does that make it layer 4? How about BGP? It runs on top of TCP. Is it layer 5? My point is although you can squeeze protocols into the layers, they don't really fit. If you were to look at the OSI presentation layer specification, I don't think HTML would quite qualify. Even OSI admitted that layer 2 was too broad and they had to divide it into two sublayers. | |
| Feb 20, 2014 at 8:57 | comment | added | Ryan Foley | Informative is great, but this is a problem/solution site. Your answer is great if the question was "What are the different layers of the OSI model, and what does each do?". The question is about the fundamentals backing the OSI model, not the OSI model directly. Great insight, but bad answer for this specific question. | |
| Feb 20, 2014 at 8:34 | history | edited | chris | CC BY-SA 3.0 |
added 224 characters in body
|
| Feb 20, 2014 at 8:31 | comment | added | chris | Which OSI layer does IS-IS operate at? - Layer 3 Is HTML a presentation or application protocol? - Presentation Are VPN tunnels layer 2 or 3? -> L2TP is layer 2 -> VPN tunnels typically works at layer3 such as IPSEC. | |
| Feb 20, 2014 at 8:29 | comment | added | chris | Still, It's informative. | |
| Feb 20, 2014 at 7:51 | comment | added | Ryan Foley | This doesn't answer the OP; he never asked what each layer did, he asked what someone should understand about the underlying concepts. | |
| Feb 20, 2014 at 5:48 | history | answered | chris | CC BY-SA 3.0 |