DNS & Name Resolution for Active Directory Flashcards

Which DNS record type is required for domain controllers to be located by clients in Active Directory?

Answer: SRV record

SRV (Service Locator) records are registered by domain controllers so clients can locate AD services like LDAP and Kerberos.

Which tool is used to manually register DNS SRV records for a domain controller on Windows Server 2008?

Answer: ipconfig /registerdns

Running 'ipconfig /registerdns' forces the DNS client and Netlogon service to re-register all DNS records for the domain controller.

What is the purpose of a stub zone in DNS?

Answer: To contain only NS, SOA, and A records for a zone to resolve names in that zone

A stub zone holds only NS, SOA, and glue A records so the DNS server knows the authoritative servers for that zone.

Which DNS zone type automatically replicates zone data to all DNS servers running on domain controllers in the forest?

Answer: Active Directory-integrated zone with ForestDNSZones scope

Forest-wide AD-integrated zones replicate through the ForestDNSZones application partition to all DNS-enabled DCs across the entire forest.

What command verifies that a domain controller has registered its DNS SRV records correctly?

Answer: nslookup -type=SRV _ldap._tcp.

Using nslookup with the SRV type query against _ldap._tcp. confirms that the DC's LDAP SRV records are present and resolving.

Which DNS feature prevents clients from receiving stale cached records by enforcing a maximum record age?

Answer: Scavenging

DNS scavenging removes stale resource records based on configurable no-refresh and refresh intervals to keep the zone clean.