Generally, an IT or Information Systems type of degree will put you down the track that people who go for certs is on. By the end you should probably have the knowledge for A+, Net+, possibly Sec+ and possibly CISSP or CISSA (I can't recall exactly which, I don't go for certs). If you look at job postings that require those certs and like what you see, that path is fine for you. But if you're looking to do software engineering you're better off with a Computer Science degree.
I think most people going back are because they're trying to make a career change and may or may not have had a degree already. You don't need a degree in that field, but it'll help. You need to be certain of the requirements of the program you apply to though. Don't take my word as gospel and then get caught out when you start applying.