The hub, switch and router in the data center have their own different functions and uses, and are the main differences and work contents of the common equipment in the network are as follows!

A hub is a physical layer network device primarily used to connect multiple network branches and broadcast data from one port to all other ports. The destination of the packet is not recognized, so all received packets are forwarded to other ports.

The main function of the hub is signal regeneration and forwarding. Without any data filtering or only forwarding, all devices on the network share the same bandwidth, which may lead to network congestion and performance degradation.

A switch is a network device that works at the data link layer to identify and filter packets and forward them to the correct port. Switches use MAC address tables to determine the destination of packets, which can reduce network congestion and improve network efficiency. Modern switches can support advanced features such as virtual LAN and quality service.

Routers are network devices that work at and above the network layer to determine the best path for packets based on IP addresses and other routing information and forward packets between different networks.

The main function of the router is to connect different networks and route data packets. It also provides network address translation to enable multiple devices to share a common IP address, as well as firewall and security features to control network traffic and protect network security.

In summary, the hub is a simple basic network device used for signal broadcasting at the physical layer, and all ports share bandwidth, which is prone to network congestion. The switch provides only packet forwarding, works at the data link layer, and can forward packets according to the MAC address, reduces the broadcast and improves the network efficiency. A router connects to different network devices, works at the network layer or above, forwards packets based on IP addresses, and provides NAT, security, and bandwidth management functions. With the development of technology, hubs are gradually being channelized by switches, while routers are still used to connect core devices of different networks.