Which feature described below, describes that one of a thick-net cable.a.Maximum distance covered by a network using thick Ethernet is 3.5 km.b.It allows a maximum of 150 stations to be connected.c.Maximum number of stations supported by the Ethernet is 1030.d.Connectors used are vampire taps.

The feature that describes a thick-net cable is: "Connectors used are vampire taps."

Thicknet cables, also known as 10Base5 cables, were commonly used in the early days of Ethernet technology. They are called "thicknet" because the coaxial cable used in this type of Ethernet setup is thicker than the thinnet or 10Base2 Ethernet cable.

The "vampire tap" was a common method of connection for thicknet. It was a clamp that physically pierced the protective layer of the cable to make contact with the inner conductor, hence the name "vampire." This method allowed for the cable to be tapped without cutting or splicing it, which made it possible to add or remove devices without bringing down the whole network.

The other features mentioned in the question are not specific to thicknet cables. For example, the maximum distance covered by a network using Ethernet technology can vary depending on the specific type of cable and technology used. Similarly, the maximum number of stations that can be connected to an Ethernet network can also vary.