1. Common analysis of domain names
1. Common analysis of domain names
A record : To point the domain name to an IPv4 address (for example: 132.168.15.20), you need to add an A record;
Domain name ----- IP address
CNAME record : Point one domain name to another domain name to achieve the same access result as the pointed domain name.
Domain name ----- Another domain name ----- IP address
The hierarchy of the domain name:
example.com ----- first-level domain name
c.example.com-----second-level domain name
www.example.com-----special second-level domain name
2. Usage scenarios
- Coping with address write dead
- Coping with possible replacement of IP
3. URL related
Protocol header: defines the rules for how data is encapsulated, packaged, unpacked and interpreted; common protocol headers: http, https, ftp, etc.;
Host name: can be understood as a domain name;
Port: If you do not specify a port, the default is 80 and 443;
Path: generally refers to the location of the resource;
Parameters: You can bring some local information to the server on the url.
2. ICP filing
The objects of filing include subjects and websites,
Subject: unit or individual, used to trace the person in charge of the website, there can be multiple access providers.
Website: IP && Domain Name.
- The IP distributed by which service provider needs to be filed with;
- If the website IP is changed and the new IP is distributed by other service providers, it needs to be re-recorded at the service provider of the new IP;
- The service provider will regularly clean up the record of the IP that is not distributed by it;