How does a gigabit switch work?

Gigabit Ethernet (1000 Mbps) is the evolution of Fast Ethernet (100 Mbps), and it is one of the cost-effective networks for various home networks and small enterprises to achieve a stable network connection of several meters. Gigabit Ethernet switches are widely used to increase the data rate to about 1000 Mbps, while Fast Ethernet supports 10/100 Mbps transmission speed. As a higher version of high-speed Ethernet switches, Gigabit Ethernet switches are very valuable in connecting multiple devices such as security cameras, printers, servers, etc. to a local area network (LAN).

In addition, gigabit network switches are an excellent choice for video creators and video game hosts who require high-definition devices.

Gigabit switch01

How does a gigabit switch work?

Typically, a gigabit switch allows multiple devices to connect to a local area network through coaxial cables, Ethernet twisted pair cables, and fiber optic cables, and uses a unique MAC address belonging to each device to identify the connected device when receiving each frame on a given port, so that it can correctly route the frame to the desired destination.

The gigabit switch is responsible for managing the data flow between itself, other connected devices, cloud services, and the internet. At the moment when the device is connected to the port of the gigabit network switch, it aims to transmit incoming and outgoing data to the correct Ethernet switch port based on the sending device's port and the sending and destination MAC addresses.

When the gigabit network switch receives Ethernet packets, it will use the MAC address table to remember the MAC address of the sending device and the port to which the device is connected. Switching technology checks the MAC address table to find out if the destination MAC address is connected to the same switch. If yes, then the Gigabit Ethernet switch continues to forward packets to the target port. If not, the gigabit switch will transmit data packets to all ports and wait for a response. Finally, while waiting for a response, assuming that a gigabit network switch is connected to the destination device, the device will accept data packets. If the device is connected to another gigabit switch, the other gigabit switch will repeat the above operation until the frame reaches the correct destination.

Post time: Jul-18-2023