Hi, Girish,
As Chad said that we provide the ethernet stack LWIP which is based on bare metal and FreeRtos os.
Pls go to the website and download SDK2.0
http://www.nxp.com/ksdk
Now, we suggest customer use FreeRTOS rather than MQX, the freeRTOS os is free of charge.
we provide TCP and UDP, and http server, ping example code.
Pls refer to the directory after you download SDK2.0 as Chad pointed:
C:\Freescale\SDK2.0_K64F\boards\frdmk64f\demo_apps\lwip
Hope it can help you
BR
XiangJun Rong