Network cable connection issue
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When to use a router? When to use a switch? What is a cat? What is a dog?
A cat was something used when accessing the Internet over telephone lines; it was a modem. Dogs are the manufacturer’s hardware authorization. Experts are welcome to explain switches and routers.
Cat: Internet access via phone, modem. Dog: Security device. Router: Internet access over a small area, automatic IP allocation. Switch: Fiber optic distribution. Routing can be used as a switch.
Dog: Provides support for the system configuration of the DCS system and the continuous operation of the monitoring screens. They are generally divided into engineer station dogs and operation station dogs.