302 Redirect

[baconman]

How exactly does a 302 redirect work. I have a.c0m at the front page of google for a keyword. I want the the website to display the content on b.c0m. without losing any rankings or passing on any linkjuice. Is a 302 redirect the way to do that?

If I do a 301 redirect, it will pass link juice and I'm assuming that a.c0m will drop off the rankings and b.c0m will take its place?

[John Williamson]

The same thing will happen with either one, both pass link juice. You can't rank a forwarded domain. Though I'm pretty sure you can rank a 'masked forward'.

[rahmanpaidar]

302 means temporary redirection. They don't pass link juice.
See the interview with Matt Cutts:

Eric Enge interviews Matt Cutts

and his statement:

Matt Cutts: "302s are intended to be temporary. If you are only going to put something in place for a little amount of time, then 302s are perfectly appropriate to use. Typically, they wouldn't flow PageRank, but they can also be very useful. If a site is doing something for just a small amount of time, 302s can be a perfect case for that sort of situation."

[baconman]

so what if I do a 302 redirect and just let it be for a few years. How is that going to work?

[UMS]

Just because a 302 redirect is temporary, it doesn't mean it has to exist for a temporary period. There's nothing stopping you using "permanent" 302 redirects.

The WordPress Pretty Link plugin uses 302 redirects by default.