I'm trying to enhance my gaming experience and I am using Xbox Support forums to do so... The thing is, I don't exactly know how to open certain ports (as shown here) on my router settings. I'm also wondering if changing my "mixed" wireless mode to "G-only" will affect my wifi for the better... any help?
Same as schwatzz said above, it basically sets your router to only focus on that band rather than switching between all possible. Best way to determine what you have that will (or won't) work with G is to switch your router to "g only" and see what happens. You can always switch back.
If memory serves, g is older than n...and n has been out for a while, so chances are most of your wireless stuff will work on g (as devices tend to be backwards compatible).