With networking, though, not only can you come equipped with questions, but you can also come equipped with answers, simply because you can predict that the other person is going to be asking you the exact same things. So in advance of your planned networking excursion, take time to prepare some responses to common questions -- particularly, "What do you do?"
Also, "What's your problem?"
This is commonly called an elevator pitch, which basically means it's a short, two- or three-sentence spiel about who you are, what you do, or what you have to offer. It's supposed to be the length of a conversation you can have in an elevator. It is also, not coincidentally, equally as uncomfortable as a conversation you have in an elevator.