I have mentioned the link of entire explanation... if you can pls go past through the first comment, the second comment explains each of that in detail. Request you to pls read with patience.
"REMOTE LOCATION QUOTA: Remote quota shares seats with the General quota. It is generally allotted to major places enroute which has got good potential or demand. Though seats allotted to this quota is not as big as the general quota the remote quota has a good number of seats. Generally places lying very close to the major station enroute are also clubbed together along with the major sation to form the remote quota. This generally involves travel from these places to end stations or from the origin to...
more... these stations. The order of confirmation is Wailting list to RAC to Confirmation.
Roadside quota is the same as that of remote quota but the exception is that the major place en route will not share seats with other locations nearby. Generally this is available only in the case of Rajdhani Expresses while there are also exceptions."
If you need any further info, pls use google.