Which device is used to connect multiple devices within the same local area…

Concept

Networking devices are classified by the OSI layer at which they operate and the scope of connectivity they provide. A switch works at the Data Link Layer (Layer 2) and is built with multiple ports specifically to connect many end devices within one LAN, forwarding frames using the MAC address table it builds for each connected device. A router works at the Network Layer (Layer 3) and joins separate networks (for example, a LAN to the internet) using IP addressing. A traditional bridge also works at Layer 2, but its classical role is to join two LAN/Ethernet segments into one, typically over a small number of interfaces — it is not built as a multiport device for many end devices.

Application

The question asks specifically for the device used to connect multiple devices within the SAME LAN. Among the given choices, the switch is the device built for exactly this role: it provides several ports so many devices — computers, printers, IP phones, and so on — can be connected to it directly, and it forwards data only to the port of the intended recipient, keeping communication within the LAN efficient.

Cross-check

• Router: Connects DIFFERENT networks (for example, a LAN to the internet) using IP addressing; it is not the device used to wire together devices that already sit inside one LAN.

• Bridge: Also a Layer 2 device, but its classical function is joining two network segments into one, typically over just a couple of interfaces — it is not built as a multiport device for connecting many end devices in a LAN.

• More than one of these: This would need at least two of the listed devices to be the device used to wire many end devices together inside one LAN. A router works across separate networks, and a bridge's classical job is joining a couple of segments rather than acting as the multiport attachment point for many hosts, so only the switch fits that role here.

• None of these: This would apply only if no listed device performed the described role; since one of the listed devices is built precisely for it, this choice does not hold.

Hence, the device used to connect multiple devices within the same LAN is the switch.