Round robin DNS is typically configured with a zone file for, say, example.com that might look like this:

ww1	IN A 192.168.1.1
ww2	IN A 192.168.1.2
ww3	IN A 192.168.1.3
ww4	IN A 192.168.1.4
www	IN CNAME ww1
	IN CNAME ww2
	IN CNAME ww3
	IN CNAME ww4

BIND will return the list with each item taking a turn at the top of the list.

Round robin maybe better than nothing but there are some fragile aspects to it. If a server goes down for maintainence or a malfunction, a round robin DNS server needs to be promptly attended to lest users continue to be directed to the defunct machine.