If routers reside at more than one layer, what is the difference between the OSI layers?
- David G.Lv 41 decade agoFavorite Answer
"If Oranges are Plants and Fruits, what is the difference between types of vegetation?"
Routers... do not... reside at more than one layer. How to put this. Routers ROUTE at layer 3, they then apply layer 2 headers (when they SWITCH the packets interfaces), and put the signals on the layer 1 wire. Okay, they kind of work on 3 levels, but each job is separate and distinct per layer.
I don't intend on re-writing what has been extensively covered a number of times by others (which, honestly, you could find by just plugging the words "OSI Model" into a search engine), so here is a link:
- GzusLv 61 decade ago
As David said, they basically reside at layer 3 for all intensive purposes. The OSI model isn't absolute, it is just a guide for the most part.
- 1 decade ago
In addition, it's worth while to also make note; that the model you're referencing isn't what's being used for the routing. the TCP/IP model is, in which it's both routing based on (OSI L3), and stripping and tagging the MAC (OSI L2) at TCP/IP L2 Internet.