CAT Theory Grade 11 Practice Test 2026 - Free Grade 11 CAT Theory Practice Questions and Study Guide

A switch is a device that links multiple wired devices so they can talk to each other on the same network. It does this by learning each device’s hardware address and building a table that tells it which port to use for delivering data to that device. When a frame arrives, the switch sends it only on the port where the destination device is, which keeps traffic local and efficient.

This matches the description because the switch’s primary job is to connect computers with cables and enable communication between them within a LAN. It does not by itself provide internet access (that’s the role of a router or gateway connected to the switch), it isn’t for creating wireless connections (that’s a wireless access point or a router with wireless), and a firewall is for security filtering rather than simply connecting devices. So the described function is exactly what a switch does.