What type of transmission does a hub use to send data?

A hub employs a transmission method where data packets are sent to all devices connected to it. This means that when a network device sends information, the hub receives that information and broadcasts it indiscriminately to every other device in the network segment. The hub does not have the capability to identify or direct the packets to a specific device, which is why all connected devices receive the same data simultaneously.

This characteristic of hubs influences how network traffic is managed and can lead to unnecessary data collisions since multiple devices might try to send data at the same time. By broadcasting data to all connected devices, a hub operates at a simpler level of intelligence, allowing for easy setup but also potentially reducing efficiency in larger networks.

The other options do not accurately describe the functioning of a hub. Specifically, direct transmission to targeted devices implies a degree of selectiveness that a hub lacks, while the terms broadcast transmission only and encrypted transmission describe different methods and protocols not associated with a hub's operation.