Multiple Choice Questions on DNS: High School Data Science and AI Basics

📚 Quick Study Guide

• 🌍 What is DNS? Domain Name System (DNS) translates domain names (like google.com) to IP addresses (like 142.250.184.78) so browsers can load internet resources.
• 🧭 DNS Resolution: The process of finding the IP address associated with a domain name. It usually involves several DNS servers.
• 🏛️ DNS Servers: These servers store DNS records. Common types include:
• 📝 A Record: Maps a domain name to an IPv4 address.
• 📝 AAAA Record: Maps a domain name to an IPv6 address.
• 📝 CNAME Record: Creates an alias of one domain name to another.
• 📝 MX Record: Specifies the mail servers responsible for accepting email messages.
• 📝 NS Record: Specifies the name servers for a domain.
• ⏱️ DNS Cache: Temporary storage of DNS records on your computer or network to speed up future lookups.
• 🛡️ DNS Security: DNSSEC adds security to DNS by using digital signatures to ensure data integrity.

🧪 Practice Quiz

1. What is the primary function of DNS?
   1. A. To encrypt internet traffic.
   2. B. To translate domain names to IP addresses.
   3. C. To manage email servers.
   4. D. To block malicious websites.
2. Which DNS record type maps a domain name to an IPv4 address?
   1. A. MX
   2. B. CNAME
   3. C. A
   4. D. NS
3. What is the purpose of a CNAME record?
   1. A. Specifies mail servers.
   2. B. Creates an alias for a domain name.
   3. C. Maps to an IPv6 address.
   4. D. Specifies name servers.
4. Which DNS record type is used to specify the mail servers for a domain?
   1. A. A
   2. B. MX
   3. C. NS
   4. D. CNAME
5. What does DNS caching do?
   1. A. Permanently stores domain names.
   2. B. Temporarily stores DNS records to speed up lookups.
   3. C. Encrypts DNS traffic.
   4. D. Blocks access to certain websites.
6. Which DNS record type maps a domain name to an IPv6 address?
   1. A. AAAA
   2. B. A
   3. C. MX
   4. D. NS
7. What is the role of NS records in DNS?
   1. A. To map domain names to IP addresses.
   2. B. To specify the name servers for a domain.
   3. C. To handle email routing.
   4. D. To create domain aliases.