TryHackMe: DNS in Detail

Hey hackers👋 this is the write-up for the DNS in Detail room on TryHackMe

Room Link: https://tryhackme.com/room/dnsindetail

The room offers a beginner-friendly exploration of the Domain Name System (DNS), elucidating how domain names are translated into IP addresses. It delves into the hierarchical structure of domain names, various DNS record types (such as A, AAAA, MX, CNAME, and TXT), and the roles of different DNS servers, including recursive and authoritative servers. The room also features practical exercises that simulate DNS queries, allowing learners to apply their knowledge in real-world scenarios. This module serves as a solid foundation for understanding DNS, which is crucial for networking and cybersecurity.

1️⃣ Task 1: What is DNS?

1. What does DNS stand for?

Domain Name System

2️⃣ Task 2. Domain Hierarchy

1. What is the maximum length of a subdomain?

63

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

_

3. What is the maximum length of a domain name?

253

4. What type of TLD is .co.uk?

ccTLD

3️⃣ Task 3. Record Types

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

MX

2. What type of record handles IPv6 addresses?

AAAA

4️⃣ Task 4. Making A Request

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

TTL

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

recursive

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

authoritative

5️⃣ Task 5. Practical

1. What is the CNAME of shop.website.thm?

shops.myshopify.com

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

THM{7012BBA60997F35A9516C2E16D2944FF}

3. What is the numerical priority value for the MX record?

30

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

10.10.10.10