http://en.wikipedia.org/wiki/Osi_model
Read and learn that, it is the OSI model and it explains the diffrent layers.
As far as managed switches go, how many PC's do you plan on putting on this network? If it is not that many, you dont need to waste money on a managed switch. Most of the things you would need to configure for a small home network can be managed through the routers config page anyway.
Edit: The wiki is kind of confusing if you dont know what you are doing, but for your purposes:
Layer 1: Physcial - The cables
Layer 2: Data Link - Switches
Layer 3: Network - Routers
I think you will do just fine with a nice Layer 2 unmanaged switch.
Read and learn that, it is the OSI model and it explains the diffrent layers.
As far as managed switches go, how many PC's do you plan on putting on this network? If it is not that many, you dont need to waste money on a managed switch. Most of the things you would need to configure for a small home network can be managed through the routers config page anyway.
Edit: The wiki is kind of confusing if you dont know what you are doing, but for your purposes:
Layer 1: Physcial - The cables
Layer 2: Data Link - Switches
Layer 3: Network - Routers
I think you will do just fine with a nice Layer 2 unmanaged switch.
