What devices are symbolized by squares with a number inside on a network design map?

The correct answer pertains to the representation on network design maps, which use squares with numbers inside to indicate specific components in the network. In this case, squares with a number inside symbolize 4-port distribution taps.

Distribution taps are crucial in network setups as they allow for the splitting of signal paths to multiple destinations while preserving signal quality. The number inside the square denotes the number of output ports available, which is indicative of the type of distribution tap being used—in this instance, a 4-port version.

Understanding this visual representation is important for anyone involved in network design or construction, as it allows for quick identification of how signals are being distributed throughout the network, which aids in planning and troubleshooting activities.

The other options refer to different devices that may not be represented in the same manner on a network map. For example, signal amplifiers generally may not be represented by a simple square with a number inside, as they often require more specific representation to illustrate their nature or purpose within the network. Similarly, connector ports and power supplies typically have distinct symbols associated with them that are not squares with a number, focusing instead on their function in connectivity and power distribution.