An Authoritative DNS Server is a crucial part of the Domain Name System (DNS) responsible for storing, managing, and providing the official DNS records of a domain. It is the final source of truth for a domain’s IP address and other DNS-related information.📌📌📌 Key Functions of an Authoritative DNS Server:1️⃣ Stores Official DNS Records: Holds records like A, AAAA, MX, TXT, CNAME, and NS for a domain.2️⃣ Responds to Queries with Accurate Data: Provides the correct IP address when asked about a domain name.3️⃣ Delegates Subdomains: Can delegate parts of a domain to other DNS servers.4️⃣ Does Not Cache Data: Unlike recursive resolvers, authoritative servers provide original data and do not store previous queries.📌📌📌 How It Works?1️⃣ A user enters a domain name (e.g., www.example.com).2️⃣ The query travels through recursive DNS resolvers.3️⃣ If the resolver doesn't have cached data, it asks the root DNS server.4️⃣ The root server directs the request to the TLD (Top-Level Domain) server (e.g., .com server).5️⃣ The TLD server then points to the authoritative DNS server for example.com.6️⃣ The authoritative server returns the correct IP address (A record) to the resolver.7️⃣ The user’s device connects to the website using the provided IP.📌📌📌 Types of Authoritative DNS Servers:1️⃣ Primary (Master) DNS Server:Stores the original DNS records and allows modifications.Manages zone files for a domain.2️⃣ Secondary (Slave) DNS Server:Gets copies of DNS records from the primary server via Zone Transfers.Provides redundancy in case the primary server fails.📌📌📌 Popular Authoritative DNS Providers:🔹 Cloud-based DNS services:✅ Cloudflare✅ AWS Route 53✅ Google Cloud DNS✅ Azure DNS🔹 Traditional DNS Hosting:✅ GoDaddy✅ Verisign✅ Dyn (Oracle)--_
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