webmail IT Administrator - Michael Martedal Hansen CO2 neutral Hjemmeside

DNS Domain Naming System


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Distributed- Hierarchical Database


Creating a Host Record

A host record is a simple record that DNS uses to relate names to associated IP addresses. For example if you needed to reach client-1 on your network but you did not know the IP address, you can use the host name, client-1 and DNS would resolve the name to an IP address so that you can reach client-1. In order for DNS to resolve the IP address of a host, a host (A) record must exist for that particular computer. In most cases, all of the computers on your network will have a host record associated with them



Creating an Alias Record

If you are hosting the web server and the ftp server on the same computer you want to set up your naming, so requests to www.swnet.dk or ftp. swnet.dk will find their way to the same server. One way of accomplishing this is to create an alias record with the name ftp, which points to the already created www host record. Alias records are also known as CNAME (Canonical Name) records.


Creating a PTR Record

A pointer record is a simple record that does the opposite of a host record. This record uses the IP address to look up the associated host name. Create a PTR record for srv-1. Unlike the host record in the Forward Lookup zone, the pointer record is not created automatically in the Reverse Lookup Zone for srv-1.



Creating a MX Record

The MX record is created on a DNS server to identify the location of the mail server. Any request that has an email suffix attached to it, such as sales@trainsignal.com, will be redirected to the host record specified in the MX record.


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