1. Which of the following DNS record types is used to resolve IPv6 addresses?
- A
- NS
- AAAA
- MX
Explanation: DNS AAAA records are used to resolve names to IPv6 addresses.
2. True or false? A DNS server that receives a request for a name resolution that is not within its DNS zone will send a failure message to the requesting client.
- True
- False
Explanation: The correct answer is False. When a DNS server receives a name resolution request for a name not within its zone, the serve will forward the request to another DNS server.
3. Which of the following is displayed by the nslookup utility?
- the configured default DNS server
- the IP address of the end device
- all cached DNS entries
Explanation: By issuing the nslookup command, the default DNS server that is configured is displayed.
4. Which of the following DNS resource record types resolves authoritative name servers?
- NS
- A
- MX
- AAAA
Explanation: NS records resolve authoritative name servers. DNS A records resolve IPv4 addresses. AAAA records resolve IPv6 addresses, and MX records resolve mail exchange servers.