DNS in detail

Prompts and answers

• 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