Untitled Flashcards Set

DNS

DNS: Domain Name space

· A hierarchical distributed naming system for computers, services

or

,

any resource connected to the Internet or a private network

· DNS provides the translation function between the two Internet namespaces

- Domain name hierarchy

- The Internet Protocol (IP) address space

- It resolves domain names to IP addresses

· DNS replaceda central hosts. Ext file

- local hosts

.

Ext file still used today

- windows/system32/drivers/ete/hosts. Ext

· Default UDP bort 53

· FQDN Fully

·

Qualified. Domain. Name vs dotted-quadXXXXXXXXXXXX

· Rightmost label is the top level domainITLD) 4-3x

- Internet Corporation for Assigned Names and Numbers (ICANN)

L Policy

- Internet Assigned Numbers Authority IANA (technical)

Regional Internet Registries

AfriNIC. net

ADNIC. net

ARIN.

net

LACNI. net

RIPE. net