All questions of Data Communication and Networking for SSC CGL Exam

Primary Function of a Switch in a Computer Network
A switch is a crucial device in a Local Area Network (LAN) that plays a vital role in connecting multiple computers and devices. Its primary function is to facilitate efficient communication between these devices.
Key Functions of a Switch:
- Connect Multiple Devices:
A switch allows various devices, such as computers, printers, and servers, to connect and communicate within a LAN. Each device is linked to the switch via Ethernet cables, enabling seamless data exchange.
- Direct Incoming Packets:
When data packets arrive at the switch, it analyzes the destination MAC address of each packet. The switch then directs the packets to the appropriate device rather than broadcasting them to all connected devices, which enhances network efficiency.
- Reduce Network Congestion:
By sending packets only to the intended device, switches reduce unnecessary traffic on the network. This targeted communication minimizes collisions and maximizes bandwidth usage.
- Support for VLANs:
Switches can also support Virtual Local Area Networks (VLANs), which enhance security and segment traffic, allowing for better management and organization of network resources.
Conclusion:
In summary, the primary function of a switch in a computer network is to connect multiple computers within a LAN. It efficiently directs data traffic by determining the correct destination for data packets, ensuring a smooth and organized communication process among connected devices. This functionality makes switches essential for modern networking environments.