MCTS 70-640 DNS & Name Resolution for Active Directory 2

Question 1

What is a conditional forwarder in DNS?

Accepted Answer

A DNS server that forwards queries for a specific domain to designated servers

Answer

A conditional forwarder directs queries for a specific DNS namespace to particular DNS servers instead of using the standard forwarder.

Question 2

In Windows Server 2008 DNS, what does enabling 'dynamic updates' set to 'Secure only' enforce?

Accepted Answer

Only domain-joined computers authenticated via Kerberos can update their DNS records

Answer

Secure dynamic updates restrict DNS record registration to authenticated domain members, preventing rogue machines from poisoning the zone.

Question 3

Which application partition stores DNS zone data replicated only to domain controllers within the same domain?

Accepted Answer

DomainDNSZones

Answer

The DomainDNSZones application partition replicates DNS data to all DNS-enabled domain controllers within the same AD domain.

Question 4

What happens when a DNS server cannot resolve a query and no forwarder is configured?

Accepted Answer

The DNS server uses root hints to contact authoritative servers on the Internet

Answer

Without a forwarder, the DNS server falls back to iterative resolution using root hints to find authoritative name servers.

Question 5

Which DNS record maps an IPv4 address back to a hostname in reverse lookup zones?

Accepted Answer

PTR record

Answer

PTR (pointer) records exist in reverse lookup zones and map IP addresses to fully qualified domain names for reverse DNS resolution.

MCTS 70-640 Exam Practice Test