Configuration Guide Configuring DNS
6 Configuring DNS
6.1 Overview
A Domain Name System (DNS) is a distributed database containing mappings between domain names and IP addresses on
the Internet, which facilitate users to access the Internet without remembering IP strings that can be directly accessed by
computers. The process of obtaining an IP address through the corresponding host name is called domain name resolution
(or host name resolution).
Protocols and Standards
RFC1034: DOMAIN NAMES - CONCEPTS AND FACILITIES
RFC1035: DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION
6.2 Applications
Static Domain Name Resolution
Performs domain name resolution directly based on the mapping between a domain
name and an IP address on a device.
Dynamic Domain Name Resolution
Obtains the IP address mapped to a domain name dynamically from a DNS server on
the network.
6.2.1 Static Domain Name Resolution
Scenario
Preset the mapping between a domain name and an IP address on a device.
When you perform domain name operations (such as Ping and Telnet) through application programs, the system can
resolve the IP address without being connected to a server on the network.
Deployment
Preset the mapping between a domain name and an IP address on a device.
6.2.2 Dynamic Domain Name Resolution
Scenario
DNS Server is deployed on the network to provide the domain name service.
Domain name "host.com" is deployed on the network.
Device-A applies to DNS Server for domain name "host.com".
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