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Understanding DNS: The Domain Name System on the Internet

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Questions and Answers

What is the function of DNS?

Encrypt Internet traffic
Translate domain names to IP addresses (correct)
Block certain websites
Organize web content

Why is DNS referred to as the 'phonebook of the Internet'?

Because it stores contact information for people online
Because it converts domain names to IP addresses (correct)
Because it retains a record of all phone numbers associated with websites
Because it allows people to make calls over the Internet

What is the main purpose of DNS servers?

To store website content
To increase Internet speed
To track users' browsing history
To eliminate the need for humans to memorize IP addresses (correct)

How does DNS resolution work?

By translating domain names to computer-friendly IP addresses (C) Signup and view all the answers

Why do users not need to interact during the DNS lookup process?

Because the process is automatic and does not require user input (A) Signup and view all the answers

What happens during a DNS query?

Conversion of hostnames into machine-friendly IP addresses (B) Signup and view all the answers

What is the DNS recursor responsible for in the context of loading a webpage?

Receiving queries from client machines and making additional requests (C) Signup and view all the answers

How is the root nameserver described in the text?

The first step in resolving human readable host names into IP addresses (C) Signup and view all the answers

What does a TLD nameserver represent in the DNS infrastructure?

Hosts the last portion of a hostname (A) Signup and view all the answers

How does a recursive DNS resolver differ from an authoritative DNS server?

The recursive resolver is at the beginning of a DNS query, while the authoritative server is at the end (C) Signup and view all the answers

What role does caching play in the functioning of recursive DNS resolvers?

It helps short-circuit necessary requests by serving requested records earlier in the DNS lookup (A) Signup and view all the answers

In the context of loading a webpage, what is the role of an authoritative DNS server?

Responds to recursive requests from clients and takes time to track down DNS records (D) Signup and view all the answers

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