DNS in Detail

• What does DNS stand for?

Domain Name System

• 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

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

MX

• What type of record handles IPv6 addresses?

AAAA

• 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

• 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