Which device is commonly used to connect computers within a LAN (Local Area Network)?

Correct option is C

A Switch is a networking device used to connect multiple computers or network devices within a Local Area Network (LAN). It operates at the data link layer (Layer 2) of the OSI model and is responsible for forwarding data only to the specific device that needs it, based on its MAC address. This makes it efficient, fast, and secure for internal communication in a LAN.
Important Key Points:
1. Switches connect multiple devices in a LAN and manage traffic intelligently using MAC addresses.
2. Unlike hubs, switches reduce network congestion by sending data only to the intended recipient.
3. They operate at Layer 2 but Layer 3 switches (with routing capabilities) also exist.
4. Switches are crucial in both home and enterprise networks.
5. Modern LANs depend heavily on switches for building efficient internal networks.
Knowledge Booster:
· Modem is used to connect a computer to the internet by converting digital signals into analog (used in WANs).
· Repeater is used to amplify or regenerate signals in long-distance data transmission, not for LAN setup.
· Router connects different networks (like a LAN to the internet) and operates at the network layer (Layer 3).