TLD = Top Level Domain = Domain name extension

Every domain name ends with an extension also called TLD, which is short for Top Level Domain.

There are 3 types of TLDs:

• generic
  This extensions are reserved for general categories or organizations.
• country-codes
  This extensions are reserved for a country or a territory and are 2 letters long.
• infrastructure
  This are special domain names and are not used widely.