Question : DHCP & DNS & Load Balancing

Just for my education and understanding:

The DHCP is suppose to send back to the client a valid IP address, but it also supposedly sends the  IP address of the DNS server it is suppose to use.  Often, you will have 2 DNS servers per location (multiple DNS used for load balancing).

1)
Are these DNS servers "pre-load" balanced, meaning certain range of IP addresses use a certain DNS server, as configured in the DHCP,

AND / OR

2)
Do / Can multiple DNS servers share the same IP address when they use they are used for load balancing?

3)
Can either be true?  If not, then, since I know #1 can be true, is there no way to set it up so that client can arbitrarily use one of several DNS servers?

Thanks,
Kam

Answer : DHCP & DNS & Load Balancing

Short answers:
1) no
2) no
3) no

When you have 2 dns server IP's in your configuration, you will never use the 2nd one unless you can't get any answer from the first (waits for timeout), then your dns querry will be sent to the second one. You can set 2,3,4 or more dns servers, but again, the ONLY one that will be used in the first in the list unless it is unavailable.
DNS servers don't load-balance each other and each one absolutely must have its own IP address
The client can only use the list of dns servers it has and only uses the first one in the list unless it is unavailable. DHCP hands out the same dns server list for everyone in that defined dhcp scope.

What is it that you are trying to accomplish?