MCTS 70-642 DNS Configuration & Name Resolution 1 — Questions and Answers
Question 1: Which DNS record type maps a hostname to an IPv4 address?
- AAAA
- PTR
- A (Correct answer)
- MX
Correct answer: A
An A record (Address record) maps a fully qualified domain name to an IPv4 address in DNS.
Question 2: Which DNS record type is used for reverse DNS lookups to resolve an IP address to a hostname?
- A
- PTR (Correct answer)
- CNAME
- NS
Correct answer: PTR
PTR (Pointer) records are used in reverse DNS zones to map IP addresses back to hostnames.
Question 3: What is the default TTL (Time to Live) unit for DNS records in Windows Server 2008?
- Milliseconds
- Minutes
- Seconds (Correct answer)
- Hours
Correct answer: Seconds
DNS TTL values in Windows Server 2008 are expressed in seconds, controlling how long records are cached.
Question 4: Which DNS zone type stores zone data in Active Directory rather than a text file?
- Standard primary
- Standard secondary
- Stub zone
- Active Directory-integrated (Correct answer)
Correct answer: Active Directory-integrated
Active Directory-integrated zones store DNS data in the AD database, enabling secure dynamic updates and multi-master replication.
Question 5: What command-line tool is used in Windows Server 2008 to query DNS records and troubleshoot name resolution?
- ipconfig
- netsh
- nslookup (Correct answer)
- tracert
Correct answer: nslookup
nslookup is the standard Windows command-line utility for querying DNS servers and diagnosing DNS resolution problems.
Question 6: Which DNS record type is used to define the mail server responsible for accepting email for a domain?
- A
- SRV
- MX (Correct answer)
- TXT
Correct answer: MX
MX (Mail Exchanger) records specify the mail servers that accept incoming email messages for a domain.
MCTS 70-642 DNS Configuration & Name Resolution 1
Which DNS record type maps a hostname to an IPv4 address?