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A switch and a hub are both devices used in networking for connecting various devices together in a Local Area Network (LAN). However, they differ significantly in how they handle network traffic.
1. Data Transmission Method:
– Switch: Operates using MAC addresses to forward data only to the device for which the data is intended. It can send data to one device at a time (unicast) or to a group of devices (multicast).
– Hub: Broadcasts the data it receives to all connected devices, regardless of which device it is intended for. All devices need to process and determine if the data is relevant to them, leading to inefficiencies and potential security risks.
2. Network Performance:
– Switch: Significantly improves network performance by reducing unnecessary traffic and collisions through its intelligent forwarding method. It can also operate in full-duplex mode, allowing for simultaneous two-way data transmission between pairs of devices.
– Hub: Can cause a lot of unnecessary traffic since data is sent to all devices on the network, which can lead to network collisions in a busy network, particularly because it operates in half-duplex mode, meaning data can only be transmitted in one direction at any one time.
3. Intelligence and Efficiency:
– Switch: Considered an intelligent device because it learns the MAC address of devices connected to each of its ports and stores this information in a MAC address table, enabling it to make precise
C. Switches operate at the data link layer while hubs operate at the physical layer