Nslookup, Dig, and the Hosts File Explained - Network+ N10-009
Watch on YouTube Nslookup, dig, and the hosts file are the three name resolution tools every Network+ N10-009 candidate must master. This video shows how to switch DNS servers inside nslookup, use dig +trace to walk broken delegations, and why the hosts file silently overrides DNS on Windows, Linux, and macOS. Includes PTR reverse lookups, flushing the DNS cache with ipconfig /flushdns and resolvectl, and a 5-step troubleshooting flow senior engineers run on every ticket. Watch the next video in the playlist for interface and hardware tools - ipconfig, ifconfig, ip, and netstat.
▶ Watch next: Wireless Site Surveys, Heatmaps, and Interference Explained - Network+ N10-009 https://www.youtube.com/watch?v=VayD7B3iTAU
Chapters
Nslookup, dig, and the hosts file are the three name resolution tools every Network+ N10-009 candidate must master. This video shows how to switch DNS servers inside nslookup, use dig +trace to walk broken delegations, and why the hosts...
Key Topics
- When DNS Breaks, You Need Proof
- Nslookup - The Cross-Platform Workhorse
- Dig - The Linux Power Tool
- The Hosts File and the Resolution Order
- Reverse Lookups and Clearing the Cache
- Real-World DNS Troubleshooting Flows