Domain names
Définition : Nom de domaine
A domain name is a symbolic address.
They are easier to use for human beings.
They create an abstraction that allows to change machines (and IP) without changing website names or email addresses for instance.
Exemple :
91.198.174.192 can be associated with wikipedia.org.
Définition : DNS
A domain name server is a server that knows how to translate domain name into IP addresses.
Exemple : Résoudre une IP
1
$ host www.wikipedia.org
2
www.wikipedia.org is an alias for dyna.wikimedia.org.
3
dyna.wikimedia.org has address 91.198.174.192
4
dyna.wikimedia.org has IPv6 address 2620:0:862:ed1a::1