SISTEMI — Esercizio 04
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📋 Testo
The Domain Name System (DNS):
When you type `www.socratico.online` in the browser, the computer must translate this name into an IP address.
Answer the following questions:
1. What is the difference between a recursive DNS query and an iterative query?
2. What is a DNS 'A' record compared to a 'CNAME' record and what is it used for?
3. Which transport protocol (TCP or UDP) is typically used for standard DNS queries and on which port?
Analisi: Explain the tree structure of DNS. Ask: 'Who performs the lookup on behalf of the client in recursive queries? What is the difference between an actual IP address (A record) and an alias of another domain name (CNAME)?'. Discuss why UDP is preferred for speed but TCP is used for zone transfers or large responses.
Your Solution Reflection Code
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