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Once you do change your nameserver settings you can go back to your web host and change all of your domain info at your web host. An A record makes sure that your domain resolves to the correct server via IP address.
It points one dns for beginners or a sub domain like whatever. MX records are for email. So how does it all work?
This defines the primary master name server for this domain. Name servers can either be master or slaves, and if dynamic DNS is configured one server needs to be a "primary master", which goes here.
If you haven't configured dynamic DNS, then this is just one of your master name servers. This is the email address of the administrator for this zone.
The " " is replaced with a dot in the email address. This is the serial number for the zone file. Every time you edit a dns for beginners file, you must increment this number for the zone file to propagate correctly.
Slave servers will check if the master server's serial number for a zone is larger than the dns for beginners they have on their system.
If it is, it requests the new zone file, if not, it continues serving the original file. This is the refresh interval for the zone.
DNS for Beginners or How Do I Connect a Domain to My Website? - Bill Patrianakos
This is the amount of time that the slave will wait before polling the master for zone file changes. This is the retry interval for this zone.
If the slave cannot connect to the dns for beginners when the refresh period is up, it will wait this amount of time and retry to poll the master.
This is the expiry period. If a slave name server has not been able to dns for beginners the master for this amount of time, it no longer returns responses as an authoritative source for this zone.
What is DNS and Why Do You Care?
This is the amount of time that the name server will cache a name error if it cannot find the requested name in this file. The general format of these records is this: The record could look something like this: However, we could just as easily use the entire FQDN if we feel like being semantic: We can do this like this: For instance, we could have an A name record defining the "server1" host and then use the "www" as an alias for this host: One case when a CNAME is recommended is to provide an alias for a resource outside of the current zone.
MX Records MX records dns for beginners used to define the mail exchanges that are used for the domain.
This helps email messages arrive at your mail server correctly. Dns for beginners many other record types, mail records generally don't map a host to something, because they apply to the entire zone.
As such, they usually look like this: IN MX 10 mail.
Note that there is no host name at the beginning. Also note that there is an extra number in there.