A network technician sets up an internal dns server for his local network. When he types in a url which is checked first

The first thing that the browser checks is the cache for the DNS record to find the corresponding IP address.

Explanation:

After the technician sets up the internal DNS server for his local network, the first thing that is checked when he types a website into the url of a browser is the cache to look for corresponding IP addresses.

DNS which means Domain Name System is a database that maintains the website name (URL) and the IP address that it is linked to. There is a unique IP address for every URL (universal resource locator).

Internal DNS servers store names and IP addresses for internal or private servers