Introduction to DNS and gateways

The following is from the screen lesson network Tony Teacher Video https://www.imooc.com/learn/258

1.DNS Introduction
DNS (Domain Name System)--the URL of a Web site
IP corresponds to URL one by one

from hosts to DNS
Directory of the Hosts file: C:\Windows\System32\drivers\etc
Hosts file has higher precedence than DNS resolution
Hosts is doing static IP and domain name correspondence

The role of 2.DNS

3. Domain Structure
“.” There are only 13 servers that represent the root domain and the root domain

4.DNS Query Type

5.DNS query Process

6. Introduction to Gateways