Question

You work as the IT Administrator for a small corporate network. CorpDC is a Domain Controller and DNS server, which hosts the CorpNet zone. For name resolution requests in other zones, you want the server to forward requests to Name Servers at the ISP ( and ).

Your task in this lab is to configure the DNS service on CorpDC to:

Forward name resolution requests outside of the CorpNet domain to the ISP DNS servers.
Use root hints for requests if the ISP DNS servers are unavailable.

Answer 1

To configure CorpDC for DNS forwarding to an ISP's name servers and using root hints as a fallback, you need to access the DNS Manager, modify the properties of the CorpNet zone, add the ISP DNS servers in the forwarders tab, and check the option to use root hints if the forwarders are unavailable.

Step-by-step explanation:

To configure the DNS service on CorpDC to forward name resolution requests for zones outside of the CorpNet domain to the ISP DNS servers, you need to perform the following steps:

1. Open the DNS Manager on CorpDC.
2. Right-click on the CorpNet zone and select 'Properties.'
3. Go to the 'Forwarders' tab.
4. Add the ISP DNS server addresses into the list.
5. Make sure to check 'Use root hints if no forwarders are available' option.

By doing so, you configure CorpDC to use the ISP DNS servers to resolve DNS queries that it cannot resolve locally. If the ISP servers cannot be reached, root hints will be used, which are DNS data for root name servers that are used to assist in locating the DNS servers that contain authoritative data for the top levels of the DNS hierarchical namespace.

This configuration ensures that internal requests are handled by CorpNet, while any other requests are passed on to the ISP, unless the ISP is unreachable, in which case the root hints take over.