Name records for DNS

In fact, DNS is not just a way to interpret addresses, but also to answer more information about the network and the host. One of the most important features is the ability to route mail systems. This information is usually present in the DNS data file with a different "record" name.

Let's refer to a Linux DNS file to see how these records are represented.

　　;
; Zone file for siyongc.domain
;
; Then full zone file
;
$TTL 86400
@ IN SOA redhat52.siyongc.domain. netman.siyongc.domain. (
1999092801 ; serial
8H ; refresh
2H ; retry
1W ; expire
1D ) ; minimun
;
IN TXT "A test domain, created by Netman"
IN NS redhat52
IN NS debian.home.
IN MX 10 redhat52.siyongc.domain.
IN MX 20 debian.home.
;
localhost IN A 127.0.0.1

　　gw IN A 192.168.0.17
IN HINFO "Redhat" "MASQ"
IN TXT "The masquerade gateway to internet"

　　redhat52 IN A 192.168.0.17
IN MX 10 redhat52
IN MX 20 debian.home.
IN HINFO "Dell PII 266" "Linux RedHat"
www IN CNAME redhat52
mail IN CNAME redhat52
ftp IN CNAME redhat52
news IN CNAME redhat52
smtp IN CNAME redhat52

　　pii266 IN A 192.168.0.15
IN MX 10 redhat52.siyongc.domain.
IN MX 20 debian.home.

　　slware36 IN A 192.168.0.18
IN MX 10 redhat52.siyongc.domain.
IN MX 20 debian.home.