MCTS 70-642 DNS Configuration & Name Resolution 2 — Questions and Answers
Question 1: What is a DNS stub zone used for?
- Caching frequently queried records
- Storing only NS and SOA records of another zone (Correct answer)
- Providing read-only copy of a primary zone
- Hosting reverse lookup records
Correct answer: Storing only NS and SOA records of another zone
A stub zone contains only the SOA, NS, and glue A records needed to contact the authoritative name servers of another zone.
Question 2: Which feature in Windows Server 2008 DNS allows clients to automatically register and update their own DNS records?
- Zone transfer
- Dynamic DNS (DDNS) (Correct answer)
- Conditional forwarding
- Round-robin DNS
Correct answer: Dynamic DNS (DDNS)
Dynamic DNS (DDNS) allows clients and DHCP servers to automatically register, update, and delete DNS resource records.
Question 3: What Windows Server 2008 DNS feature directs queries for specific domains to designated DNS servers?
- Root hints
- Stub zones
- Conditional forwarders (Correct answer)
- Secondary zones
Correct answer: Conditional forwarders
Conditional forwarders direct DNS queries for specific domain names to specified DNS servers rather than using standard recursion.
Question 4: Which DNS security extension validates DNS responses to prevent cache poisoning attacks?
- IPsec
- DNSSEC (Correct answer)
- SSL/TLS
- Kerberos
Correct answer: DNSSEC
DNSSEC (DNS Security Extensions) uses digital signatures to authenticate DNS responses and protect against cache poisoning.
Question 5: In Windows Server 2008, what type of DNS zone contains a read-only copy of zone data received via zone transfer?
- Primary zone
- Secondary zone (Correct answer)
- Stub zone
- Cache-only zone
Correct answer: Secondary zone
A secondary zone is a read-only copy of a primary zone, populated through zone transfers from the primary DNS server.
Question 6: Which record type maps a hostname to an IPv6 address in DNS?
- A
- PTR
- CNAME
- AAAA (Correct answer)
Correct answer: AAAA
AAAA records map a fully qualified domain name to a 128-bit IPv6 address (four times the size of an A record's 32-bit IPv4 address).
MCTS 70-642 DNS Configuration & Name Resolution 2
What is a DNS stub zone used for?