Discussion about USB over Ethernet driver

Hello Everyone,

i'm reading the USB over Ethernet from the below link

http://www.keil.com/pack/doc/mw/USB/html/dev_cdc_ncm.html.

i'm trying to build the software in the similar manner with few changes. but i'm not getting the following things.

1. who is acting as server and who is acting as client ?

2. whether it is possible to change the IP address ?if YES then how to change it ?

3. whether USB over Ethernet is acting as the DHCP server and client configuration. if YES please explain how?.