Network request process

ip agreement ： Used to address
tcp agreement ： Transfer protocol , Preserve the integrity of the data

IPv4：32 position 2 Base number
for example ：192.168.0.1
An eight bit binary represents a number
192.168 Start with LAN （ Only the internal router can recognize ）

dynamic ip： There will be changes due to service providers and other factors , So the server can only use static ip