Default how to root i9205 on UCNA2 firmware?

hi, i have a simple question, is it possible to root my device? i've never root my mega 6.3 since i bought it...... but i heard that the recent firmware have some problems in the possibility of rooting it.

there are a lots of guide but everyone say a different method. OK I AM A NOOB OF MODDING.

but is quite difficult to understand guides that are different in this way:
1) some indicates to just use an apk autorooting the device
2) some do require to change thekernel + manually install the superuser apk
3)not permanent root....
4) others......

so, please be patient...... i only want to find a "normal" root method.......and IF POSSIBLE a root that could allow me to easily UNroot the device to be able to update my firmware OTA in the moment samsung will update our great device to kitkat