linux--Information Analysis (iv) Domain name Analysis dig, host,

1. The naming format of the domain name is: WWW. < user name;. < two level domain name;. < first-level domain name > dig www.baidu.com

Explanation of the parsing process:

· The DNS client contracted to the DNS server to request the IP address of the www.baidu.com due to a CNAME record;

· The DNS client accesses the www.a.shifen.com domain name server (the equivalent of a domain name server that accesses www.baidu.com);

· Here www.a.shifen.com Domain Name server is responsible for DNS query traffic balance Scheduler, responsible for the DNS request to the ns5.a.shifen.com, ns6.a.shifen.com and other domain name servers

· Finally, the name servers marked NS will return the IP of Baidu to the DNS client.

· And then we got the www.baidu.com IP address.

2. Host www.smatrix.org

3, host-t NS smatrix.org

4, Fierce-dns samtrix.org

5, Nslookup www.smatrix.org

linux--Information Analysis (iv) Domain name Analysis dig, host,