In electronics and particularly computing, a jumper is a short length of conductor used to close, open or bypass part of an electronic circuit. They are typically used to set up or configure printed circuit boards, such as the motherboards of computers. The process of setting a jumper is often called strapping.
Different types and colors of jumpers, with a couple of jumper pins for scale.
Red jumper on a pin header
A shunt is a device that is designed to provide a low-resistance path for an electrical current in a circuit. It is typically used to divert current away from a system or component in order to prevent overcurrent. Electrical shunts are commonly used in a variety of applications including power distribution systems, electrical measurement systems, automotive and marine applications.
AC source with meters and meter-shunts plus load with load-shunt
50 A shunt resistor, with provision for four-terminal sensing