Examples of Domain Name System (DNS) Records

📚 Quick Study Guide

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• A Record: Maps a hostname to an IPv4 address (e.g., `example.com` to `192.0.2.1`).
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• AAAA Record: Maps a hostname to an IPv6 address (e.g., `example.com` to `2001:db8::1`).
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• MX Record: Specifies the mail server responsible for accepting email messages on behalf of a domain. Includes a priority value.
⚙️
• CNAME Record: Creates an alias of one domain name to another (e.g., `www.example.com` to `example.com`).
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• TXT Record: Holds text information for various purposes, such as domain verification or SPF records.
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• NS Record: Specifies the authoritative name servers for a domain.
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• PTR Record: Maps an IP address to a hostname (reverse DNS lookup).
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• TTL (Time To Live): Specifies how long a DNS record is cached.

🧪 Practice Quiz

1. Which DNS record type is used to map a hostname to an IPv4 address?
   1. A Record
   2. MX Record
   3. CNAME Record
   4. NS Record
2. Which DNS record type is used to map a hostname to an IPv6 address?
   1. AAAA Record
   2. A Record
   3. MX Record
   4. CNAME Record
3. Which DNS record type is used to specify the mail server for a domain?
   1. MX Record
   2. A Record
   3. CNAME Record
   4. TXT Record
4. Which DNS record type is used to create an alias for a domain name?
   1. CNAME Record
   2. A Record
   3. MX Record
   4. NS Record
5. Which DNS record type is used to hold text information, such as SPF records?
   1. TXT Record
   2. A Record
   3. MX Record
   4. CNAME Record
6. Which DNS record type specifies the authoritative name servers for a domain?
   1. NS Record
   2. A Record
   3. MX Record
   4. CNAME Record
7. Which DNS record type maps an IP address to a hostname?
   1. PTR Record
   2. A Record
   3. MX Record
   4. CNAME Record