Freescale Semiconductor TWR-MCF52259-Ethenet User Manual page 97

How Does the Host Know a Device's Requirements?
These requirements are communicated to the host
through a hierarchy of C program descriptors. The types
of descriptors include:
1. Device Descriptors
2. Configuration Descriptors
3. Interface Descriptors
4. Endpoint Descriptors
5. String Descriptors
TM