ritheachengkh

DNS in Detail

Learn how DNS works and how it helps you access internet services.

Task 1 What is DNS?

What does DNS stand for?

✅ Domain Name System

Task 2 Domain Hierarchy

What is the maximum length of a subdomain?

✅ 63

Which of the following characters cannot be used in a subdomain ( 3 b _ - )?

✅ .

What is the maximum length of a domain name?

✅ 253

What type of TLD is .co.uk?

✅ ccTLD

Task 3 Record Types

What type of record would be used to advise where to send email?

✅ MX

What type of record handles IPv6 addresses?

✅ AAAA

Task 4 Making A Request

What field specifies how long a DNS record should be cached for?

✅ TTL

What type of DNS Server is usually provided by your ISP?

✅ recursive

What type of server holds all the records for a domain?

✅ authoritative

Task 5 Practical

What is the CNAME of shop.website.thm?

✅ shops.myshopify.com

What is the value of the TXT record of website.thm?

✅ THM{7012BBA60997F35A9516C2E16D2944FF}

What is the numerical priority value for the MX record?

✅ 30

What is the IP address for the A record of www.website.thm?

✅ 10.10.10.10