Explain the purpose of a network switch.

A network switch is a crucial component in local area networks (LANs) that plays a primary role in facilitating efficient communication between various devices such as computers, printers, and servers. The purpose of a network switch is to receive incoming data packets from one device and direct them to the appropriate destination within the network.

By intelligently managing where data is sent based on MAC addresses, switches minimize unnecessary data traffic, enabling faster and more reliable communication. This capability is significantly advantageous in busy networks, where proper data allocation reduces congestion and improves overall network performance. Switching technology helps ensure that each device can communicate with others without interfering with the traffic of other devices, thus optimizing bandwidth and enhancing the user experience.

In contrast, other options do not accurately represent the functionalities of a network switch. For instance, while connecting external storage devices may be performed through a network, it is not a primary function of a switch. Similarly, enhancing wireless connectivity refers to access points rather than switches, which are typically concerned with wired connections. Lastly, saying that a switch cannot manage data traffic does not capture its essential role in data routing and performance enhancement in a networked environment.