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| Accueil → WEBDEV 2024 → Need help understanding DNS basics for CIW Web Foundations Associate exam |
| Need help understanding DNS basics for CIW Web Foundations Associate exam |
| Débuté par ivanabaquero, 13 nov. 2025 12:15 - 1 réponse |
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| Posté le 13 novembre 2025 - 12:15 |
Hello everyone,
I’m currently preparing for the CIW Web Foundations Associate (1D0-610) exam and I’m reviewing Domain 1, specifically the topic about the Domain Name System (DNS). I understand that DNS helps translate domain names into IP addresses, but I’m struggling to clearly understand how the DNS hierarchy works (root, TLD, and authoritative servers).
Could anyone explain the structure and process of how a DNS query is resolved, maybe with a simple example?
Thanks in advance for your help! |
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1 message |
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| Posté le 13 novembre 2025 - 12:24 |
The Domain Name System (DNS) is like the Internet’s phone book. It converts easy-to-remember domain names (like www.example.com) into IP addresses (like 93.184.216.34), which computers use to locate each other on a network.
Here’s how a DNS query works step by step:
1. User Request: You type a web address into your browser.
2. Local Cache Check: The browser or operating system first checks its local DNS cache to see if it already knows the IP.
3. Recursive Resolver: If not found, the query is sent to a DNS resolver, usually provided by your ISP or a public service like Google DNS.
4. Root Server: The resolver asks a root DNS server which top-level domain (TLD) server (.com, .org, etc.) to contact next.
5. TLD Server: The resolver then contacts the TLD server, which directs it to the authoritative name server for that domain.
6. Authoritative Server: This server has the final answer and returns the IP address for the requested domain.
7. Response to User: The resolver passes this IP back to your browser, which then connects to the web server to load the page.
Each step can take only milliseconds, but understanding this hierarchy (Root → TLD → Authoritative) is key for the exam.
If you want a more structured explanation with examples and diagrams, I highly recommend using Study4Exam they provide detailed CIW Web Foundations Associate study guides, practice questions, and DNS simulations that make the concept much easier to visualize and remember. |
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