Sorry, I did not really make myself clear last time. The original question was what is the difference between a managed and unmanaged switch.
Do Not confuse a Managed switch with a configurable switch. If a switch cannot be remotely managed through VTP (VLAN Trunking Protocol) it is not a Managed switch. You can configure switches all day long but a Managed switch involves a switch that can act as a server or a client (or transparent) in a VTP domain. If all of this is Greek to you need to study multilayer switching.
The Multilayer Switching companion guide for the CCNP - 3 course, formerly semester 7 in the Cisco Academy, is a good start. All Managed switches can be configured but not all configurable switches can be managed. I hope this helps clear up a few misconceptions.
