CompTIA A+ Certification Core 1 (220-1101) - Working with DNS

The video tutorial covers the basics of DNS and DHCP, explaining how DNS is provided by DHCP servers and how to check DNS settings using ipconfig. It demonstrates configuring DNS settings both automatically and manually, including using public DNS servers like Google's. The tutorial highlights common DNS issues and introduces nslookup as a tool for troubleshooting DNS problems, explaining how to verify if a DNS server is functioning correctly.

What command can you use to check your DNS server settings on a Windows system?

• tracert

• ping

• ipconfig /all

• netstat

Why might you want to configure a DNS server manually?

• To prevent IP address conflicts

• To ensure DNS resolution within a local network

• To increase internet speed

• To avoid using DHCP

Which of the following is a well-known public DNS server provided by Google?

• 9.9.9.9

• 8.8.8.8

• 1.1.1.1

• 7.7.7.7

What is the primary purpose of the nslookup tool?

• To check if a DNS server is functioning

• To configure network adapters

• To monitor network traffic

• To reset DNS settings

What type of DNS record is used to map a domain name to an IP address?

• CNAME record

• PTR record

• MX record

• A record

What does a timeout response in nslookup indicate?

• The IP address is incorrect

• The DNS server is not reachable

• The network connection is slow

• The DNS server is functioning correctly

If you suspect your DNS server is down, what should you do first?

• Disable your firewall

• Reinstall your network drivers

• Switch to a different DNS server

• Restart your computer