Background: The need ip + port when a new project, part of the RPC service call.
In the process go work order system, forced to fill in the domain name. Even before the operation, I feel domain name is not important. I would need to fill in ip + port, you give the whole domain name, then I port where to write? (Always thought domain = ip + port) OP sent me a specification document, I looked at, which said only the domain name resolved to the corresponding service. Repeatedly read, the meaning is clear: the domain name can only correspond to ip.
This is very different from my previous understanding, always thought before the domain name is ip + port.
First thought of DNS, I looked host configuration of the machine, the domain name really only corresponds to the ip, no port.
So search a lot, https: //www.jianshu.com/p/806d0514ec7d utm_campaign, ask a lot:? Https: //www.v2ex.com/t/573094#reply3. Generally understand the
Only the corresponding domain name IP.
If the domain name without the port, then, http request is the default port 80, https the default is 443.