What is DNS Host Mapping?

What is DNS Host Mapping?


DNS Host Mapping is a process that maps the IP address of a domain to a hostname. This process can be done externally or internally by your server. By mapping your domain name to an IP address, you are able to connect with people through their web browser without having them have to remember specific numbers for each site they visit.

Host Mapping is a simple process that can be completed by most servers. In larger companies, an administrator will complete the mapping externally and in-home server setups, hosts are mapped internally.

What is DNS Host Mapping?

DNS host mapping is the matching of hostname to IP address for routing internet traffic. It directs the messages to their destinations by storing the address of computers on your network in a “hosts” file.

DNS mapping is built into most operating systems but can be turned off in some cases. Most operating systems have a “hosts” file that is located in the /etc directory. The host’s file contains IP addresses and their corresponding hostnames, which can be used to route traffic when DNS fails.

How many types of DNS Host Mapping?

There are two types of DNS Host Mapping: Dynamic and Static.

Dynamic is the more common type of mapping, as it uses a round-robin rotation to update the IPs assigned to the domain. When a DNS query is made, it will return all of the available IPs for the domain. When a DNS query is made using the IP, it will return these three IPs in rotation, allowing the end-user to access any of them and ensuring that any sessions do not become locked to one specific web server and reduce availability and uptime.

Static mapping creates a one-to-one relationship between a domain and its IP address. This is much less common. When a DNS query is made, it will return one single IP address per domain. This can allow you to ‘protect’ your servers with an extra layer of security since you are the only ones who know which server they are connecting to.

How does it work?

DNS mapping helps to map domains and hostnames to IP addresses. When a request is made for a domain, its DNS server checks the A records in the zone files. If it does not find an A record, it will return with a “no such domain” message. This means that the name is not translated into an IP address and so cannot be resolved. If there is no A record, but there is an NS record, then this indicates that another server will handle all queries for that name and we need to query that other server.

Once we have queried the second server, it will return with a list of A records for that domain and we can then resolve these into IP addresses. If there is no NS record and only an SOA record, then this indicates that we should ask another name server to handle all queries for that domain. This other name server may be on the other side of a connection which prevents us from being able to query it directly. We may need to resort to using another proxy server or the Root name servers.

What are the benefits of using a DNS host mapping service?

The main benefit of using a DNS host mapping service is that it can keep all of your web pages in one location while making them seem to be on the map. A major drawback to using a DNS host mapping service is that if there are any issues with the mapped servers, you are also likely to have problems with your web pages.

A DNS host mapping service is a system that allows you to map your website with a web address, such as maps.google.com, so instead of seeing google.com, visitors would see the actual domain name of your site on their screens when they visit it. While the physical location of your site does not change, visitors can still type in any old domain name and will be taken to your mapped website instead.

What are the drawbacks to using a DNS host mapping service?

A DNS host mapping service is not always reliable because it relies on external servers. Many factors can contribute to the host being unreachable including outages, storms, and connectivity issues. The DNS server may also have a problem that makes it inaccessible. If you are reaching the host through the host mapping service, you will have no way of knowing that something is wrong with the connection.

Another drawback is that if you are reachable through a host mapping service, your visibility increases. Since visibility on the Internet is important to many people and their businesses, this can be seen as a drawback. It also makes it easier for you to be hacked since more eyes are on your internet traffic which increases the possibility of some sort of vulnerability. Overall, using a host mapping service does not provide many benefits that outweigh the risk of using it.


DNS host mapping services are a great way to consolidate all of your domains onto one server. This can save you time and money by allowing you to have just one web hosting service for your business domain, instead of paying multiple companies. It can also help you better manage your hosting since one service has all of the responsibility. When you use DNS host mapping, you are creating a subdomain for each domain that you wish to be hosted on the same server. Your hosting service will then send users to the correct domain, based on your mapping.

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