Which of the following best describes a hub in a network?

A hub in a network serves as a central point for relaying network signals to multiple devices. It operates at the physical layer of the OSI model, meaning that its primary function is to transmit incoming data packets to all connected devices without processing the data. When a data packet arrives at the hub, it broadcasts that signal to all other ports connected to it, allowing all devices on the network to receive the same data.

This characteristic is essential for understanding how networks function, especially in simpler topologies. Hubs do not distinguish between data packets or direct traffic; they simply ensure that signals reach all connected devices. The simplicity of this design makes hubs less intelligent compared to switches, which can manage data traffic more efficiently by sending data only to the intended recipient.

In contrast, the other options describe different types of network devices or functions that do not align with the fundamental purpose of a hub. For example, the choice indicating a device that encrypts network data refers to specific security protocols rather than data relay capabilities. The option describing a firewall relates to a security feature that filters traffic, and the option about a storage device pertains to data retention rather than data transmission. Hence, the description of a hub as a central point for relay of network signals accurately captures its