Answers:
notebook > Cable or DSL modem > router > xbox ( near Ethernet cord or wirelessly )
Share Media from a PC next to Xbox 360
Technical Support
* Firewall port settings for Windows Media Connect.
* Troubleshoot connections near Windows XP PCs running Windows Media Connect.
* Firewall ports that you must initiate to connect Xbox 360 to a Windows Media Center-based computer.
To access medium files, including video, audio, and pictures, from a Windows XP–based PC, you inevitability a simple Ethernet nouns from the Ethernet port on the pay for of your Xbox 360TM console to your PC. (An Ethernet cable is supplied near the Xbox 360 video hobby and entertainment system; not included next to the Xbox 360 Core system.)
More on this subject at this link
http://www.xbox.com/en-us/support/system...
Hope this is useful
Pat