Which of the following connector types would require a punch down tool to attach a network cable to it?

An F-connector is used on coaxial cable and is attached by crimping or threading, not by using a punch-down tool.

An ST connector is a fiber optic connector terminated with epoxy/polish or pre-polished crimp methods, not a punch-down tool.

A 110 block uses insulation-displacement contacts that require a punch-down tool to seat each individual wire conductor into the block, simultaneously making the electrical connection and trimming the excess wire. This is the standard method for terminating horizontal cable runs at patch panels and wall jacks in structured cabling. F-connectors, ST connectors, and RJ-45 connectors all use different termination methods that do not require a punch-down tool.

An RJ-45 connector is crimped onto UTP cable using a dedicated RJ-45 crimping tool, not a punch-down tool.