问题
xip.io welcome screens says this :
10.0.0.1.xip.io resolves to 10.0.0.1
Why do we need to go through xip io when I can directly use the IP?
Is it used to access servers by domain name instead of IP?
回答1:
The main use case is when your application needs to support multiple subdomains.
Take for example these production subdomains:
- www.example.com
- admin.example.com
- members.example.com
Or you can consider a multi-tenant application where each account gets its own custom subdomain:
- mycompany.example.com
- anotherguy.example.com
So it's easy enough to setup a production environment to serve this requests.
But without a service like xip.io for your development environment, you cannot put a subdomain in front of an IP address to route your request appropriately.
To get around this, you can access your application through a subdomain like this through xip.io:
http://mycompany.10.0.0.1.xip.io/
As xip.io states, this then works flawlessly if you're trying to access the application from other machines on your local network, be they smartphones, tablets, other OSes within VMs, etc.
来源：https://stackoverflow.com/questions/37150895/why-is-xip-io-needed-when-i-can-access-the-ip-directly