No. A MIB (Management Information base) is a collection of values that describe a device to a management system.
If you were to imagine a series of menus, and everytime you made a selection, you wrote that number down as part of a sequence ... what you are doing is creating a tree where each successive choice drills down closer to a particular endpoint.
An Object IDentifier is essentially the same thing. an OID is a series of dot-delimited numbers, each number represents a selection that further identifies a parameter or characteristic of a device, or a component of a device (like: Cisco, switch, stackable, interface, ethernet, 100meg, full-duplex, UP, ...).
The details get a little ugly. For a better (probably much better) explanation, do a search on MIB, MIB2, SNMP, Network Management).
Good Luck
Scott
