DOMAIN NAMES

  • For convenience a domain name is normally assigned to each machine (for people remember names is easier than numbers)

     

  • The name is assigned meaning with the most general part on the right (opposite to IP addresses):

    machine.subdomain.organization.country


    or in our case, for ex.:
    www.ictp.trieste.it

     

  • This allow the IP number to be changed while the user using the name sees no change
     
  • To convert names into numbers you need the Domain Name System (DNS), a hierarchical domain-based naming scheme with a distributed database system.