Distributed Systems

Name Services

Name Services

Overview

Names and Addresses

e.g. name

Uniform Resource Identifiers

Name Services

Goals of Global Name Service

Name spaces

Name Resolution

Distribution

Navigation

Caching

Domain Name System

Name space

DNS Tree

Queries

Name servers

Database: Resource Records

(Name, Value, Type, TTL)
Type Value
A IPv4 address for hostname Name
AAAA IPv6 address for hostname Name
NS Hostname of authoritative DNS server for domain Name
CNAME Canonical hostname for alias hostname Name
MX Mail exchange. Canonical name of a mail server. Allows company to have same aliased name for mail and Web

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