A typical DNS record may look something like this:
; Nameservers
;
IN NS ns1.4servers.com. ; 123.456.789.01
IN NS ns2.4servers.com. ; 123.456.789.02
;
; Domain Mail Handlers
;
yourdomain.com. IN MX 0 mail
yourdomain.com. IN MX 10 mail
;
;
; hosts in order
;
yourdomain. IN A Your.IP.XXX
www IN A Your.IP.XXX
smtp IN CNAME www
pop IN CNAME www
ftp IN CNAME www
mail IN A Your.IP.XXX
;
; end
Since DNS records are made up entirely of text, they are easy to modify when needed. However, one small typo could redirect a domain name to the wrong Web server or prevent it from showing up at all. This is why it is important to enter DNS information accurately and double-check your changes entry before saving the zone file.