Route hang? What is it?

Question

Computer networks

They told the next. situation: The company used the service of one hoster, then switched to the services of another. When switching to the services of a new hosting provider, the web page was updated in parallel. When entering the site inside the company, it went to the old site, but when using another Internet, the transition was to an updated page. When calling the provider, they said that the routes could hang.

I have recently been studying networks and everything connected with them, explain the situation, what happened, what a jamb. And whether in general there is such concept as "hanging up of routes"?

Answer 1

There is no concept of "hanging routes".
You most likely have a DNS cache, when the DNS server gives the address of the old server.
It is treated either by resetting the cache on all upstream servers (on the router, on the provider's server, etc.), or by waiting for the cache lifetime to expire and the record to be updated.