Which of the following types of hubs does NOT regenerate the signal when transmitting over the normal specified distance?

A passive hub does not regenerate the signal when transmitting over the normal specified distance. Its primary function is to simply connect multiple devices on a network, allowing them to communicate with each other. Passive hubs do not amplify or improve the quality of the signals traveling through them; they merely serve as a conduit for existing signals.

In contrast, active hubs do regenerate the signal, which boosts the signal strength and allows it to travel longer distances without degradation. Smart hubs and intelligent hubs also perform additional functions, such as error checking or traffic management, and are equipped with capabilities to enhance the performance of the network beyond simple signal transmission. Therefore, passive hubs stand out as the option that does not have any signal regeneration capability.