I am currently setting up two web servers for a client on Amazon AWS (EC2). Both are up, secure and functioning (one is in Singapore and one is in North America) and everything is great. However, as much as I know about programming and server management, I'm completely useless when it comes to DNS. I need to have the domain setup so the user is directed to the nearest server (i.e. client in Asia --> Singapore Server, client in North America --> US Server). How would I accomplish this?
Also, I attempted to search for an answer on Google, but as I am mostly self-taught, I don't really know what the exact terminology is for this!
Thanks in advance for your assistance.
NOTE: Right now the domain (say, example.com) is pointing to a single server via A Record in the zone file.