NCTI Business Services Technician Practice Test 2026 - Comprehensive Exam Prep

A switch primarily functions to connect devices within the same network, facilitating communication and data transfer between them. When devices, such as computers, printers, or servers, are connected to a switch, the switch allows these devices to communicate directly with one another by receiving incoming data packets and forwarding them to the intended device based on MAC addresses. This process helps to efficiently manage local area network (LAN) traffic and ensures that the right data reaches the correct destination while minimizing collisions.

In contrast, other options describe different network devices or functions that do not align with the primary role of a switch. For instance, directing traffic between different networks is typically a function of a router rather than a switch. While encryption of data is crucial for securing communications, it is not a function performed by a switch but rather by security protocols and devices designed for that purpose. Lastly, data storage is associated with servers or storage devices, not switches, which are designed to facilitate network connectivity and communication instead.