Your company has a single Active Directory forest that has a domain in North America named na.contoso.com and a domain in South America named sa.contoso.com. The client computers run Windows 7.
You need to configure the client computers in the North America office to improve the name resolution response time for resources in the South America office.
What should you do?
A.
Configure a new Group Policy object (GPO) that disables the Local-Link Multicast Name Resolution feature. Apply the policy to all the client computers in the North America office.
B.
Configure a new Group Policy object (GPO) that enables the Local-Link Multicast Name Resolution feature. Apply the policy to all the client computers in the North America office.
C.
Configure a new Group Policy object (GPO) that configures the DNS Suffix Search List option to sa.contoso.com, na.contoso.com. Apply the policy to all the client computers in the North America office.
D.
Configure the priority value for the Service Location (SRV) records on each of the North America domain controllers to 5.
Why is this one C ?
Wouldn`t the client computers in na.contoso.com then have slow name resolution response for recources in na.contoso.com?
Sometimes best of a bad lot will have to do. The other three options won’t achieve the target at all, at least, that I can see..
Simon is correct. LLMNR is run on the local network only (hence link-local) and won’t find the resources in the sa.contoso.com domain. Also, LLMNR runs after DNS has failed so it wouldn’t have an effect on the DNS response times. A and B are out.
Changing the priority values on the NA domain controller’s SRV records also wouldn’t have any effect on the response time to the SA domain resources, unless it is talking about making the SA SRV records have different priority weights on the NA controllers. This assumes a lot of information not provided in the question, and still doesn’t really achieve the desired result as DNS would still search through the NA records first before moving to the SA records.
The question is pretty straight forward, and while you would definitely come up with a better answer in the real world (like creating a stub zone or even better a secondary zone), option C does provide the desired result of making the SA.contoso.com resources resolve more quickly in NA.