DIP switches are very small and are usually flipped with a pointed object such as a bent paper clip or a ballpoint pen. Below is a picture of two types of Dip Switches. Jumpers are small pins on the board with plastic or metal devices that go over the pins. This device is called a bridge. When the bridge is connected to any two pins, it completes the circuit between those pins, telling the computer what it need to know.
Jumpers are much more common than switches, but they are harder to use.
If asked to remove a bridge, always save it for later. A little trick is to leave the bridge hanging on one pin. The computer will think the bridge is gone, but its still there so that you don't lose it. Also, knowing the jumper settings for your device can be a chore. You must have the device's manual to do it.