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3024814
DNS - Domain Name System
Description
Mind Map on DNS - Domain Name System, created by Ramon Henrique on 03/07/2015.
Mind Map by
Ramon Henrique
, updated more than 1 year ago
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Created by
Ramon Henrique
almost 9 years ago
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Resource summary
DNS - Domain Name System
Funções
Tradução de hostname para endereços IP
Criação de apelidos para nomes canônicos
Criação de apelidos para servidores de email
Distribuição de carga
Criar um conjunto de endereços IP para um único hostname
Banco de dados hierárquico distribuído
Root server
13 roots
TLD(Top Level Domain) server
Exemplos
.org
.com
.edu
Authoritative Server
Exemplos
amazon.com
yahoo.com
Formas de Consultas
Iterativa
Toda Resposta vem para o servidor local
Recursiva
Somente a resposta final vem para o servidor local
Normalmente é feita uma abordagem usando ambas
recursivo para o servidor local e iterativo para os outros
RR(Registro de Recursos)
(Name,Value,Type,TTL)
TTL=Tempo de via útil que ficará na caching
Type
A=(hostname,IP,A)
NS=(Domain,host)
Cname=(canonical name,domain)
MX=(alias server name,hostaname)
Formato de mensagem de consulta
Media attachments
79da1ba5-adac-4db9-a04e-33d36424bba4.gif (image/gif)
9d65073c-e024-408f-9036-03e0b2f5b0d6 (image/jpg)
7571b225-89fa-4bb9-883b-6f06fb67b01a (image/png)
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