iOS jailbreaking, or simply jailbreaking, is the process of removing the limitations imposed by Apple on devices running the IOS operating system through use of custom kernels. Such devices include the iPhone, iPod Touch, iPad, and 2nd Gen Apple TV. Jailbreaking allows users to gain full access (or root access) to the operating system, allowing IOS users to download additional applications, extensions, and themes that are unavailable through the official Apple App Store, via installers such as Cydia. Redsn0w 0.9.6rc9 can be used to Jailbreak IOS 4.3.1 (untethered) on your iPad. Just follow the below instructions on How to Jailbreak iOS 4.3.1 on iPad with Redsn0w 0.9.6rc9:
Step#1: To begin with, Update/Restore your iPad to IOS 4.3.1 firmware via the IPSW file with iTunes 10.2.1. And then launch Redsn0w and browse the IOS 4.3.1 firmware file. Redsn0w must recognize the file in order to proceed.
Now let Redsn0w do the rest! Once your iPad reboots automatically it will be fully jailbroken (untethered) on IOS 4.3.1 firmware. Don’t forget to share you experience on How to Jailbreak iOS 4.3.1 on iPad with Redsn0w 0.9.6rc9.