*I'm new to domains*
On all of the tutorials online, DHCP and DNS are installed at the same time a server is promoted to DC.
Here's my question: if the server is giving out IP addresses and also doing DNS (instead of my router), then how do the clients reach the internet? Do I have to make sure the IP address range is the same as the router's?
Also, I'm going to promote a 2nd server to DC. Should that DC also have DHCP and DNS roles as a failsafe?