In terms of network topology, a medium and large HD network video surveillance system needs to adopt a three-layer network architecture: access layer, aggregation layer, and core layer.
In large LAN, this kind of function is perfect, it is very helpful to master three-layer switch, but some manufacturers can also directly connect to the Internet to provide router function.
A PoE power supply switch is a switch that provides power to the remote power receiving terminal through the network cable.
A switch means "switch" is a network device used for electrical (optical) signal forwarding. It provides an exclusive electrical signal path for any two network nodes that access the switch. The most common switch is an Ethernet switch. Other common telep