Internet providers (ISPs) maintain a DNS name cache system to avoid repetitive requests and reduce the expense of unnecessary traffic on the network.
Therefore, when a page is found on services that use this system, there is a DNS lookup on the Internet and it is cached for a specified period for future similar requests.
This means that when we make a DNS change to serve the zone, these services continue to query the cached old DNS and access to the old address.
This cache is renewed, generally between 2 hours or up to 72 hours according to each provider, and can be extended depending on the consistency in which the previous server is used. The less use, the longer the propagation time. Even so, this may vary according to each established configuration.
It is not possible to do a "DNS change synchronization immediately", and it should not be considered as an error, but as a process of propagation from your current internet provider, which does not instantly update the changes from Server to Server, ( DNS). This is usually corrected automatically in an average of 24-72 hours.
The DNS server or "domain name server" is responsible for consulting and managing the database in real time to respond to requests that relate a server to a domain.
As a rule, the DNS server is hosted in dedicated service, and they refer to its use in the implementation of primary and secondary DNS server (s).
Primary, primary or master server: a DNS server is called that stores the DNS zone information of the domain in its own database.
Secondary or slave server: when the information of the primary server cannot be obtained or is inaccessible, this server becomes secondary or slave for this information. This situation occurs when a primary server cannot resolve a query request and uses the information available on another registered secondary DNS server.
The domain name system is designed so that each domain has at least 2 DNS server names. These types of systems are generally implemented to create a server cluster that stores identical DNS zone data in several places, thus creating redundancy and secondary server availability in case of failures in the primary server.
The domain name was created to make it easy to remember and allow IP addresses to be shorter and friendlier. Each server has one or more IP addresses assigned, for this reason a domain name helps not have to memorize each IP address number.
Registering a domain helps us remember the address where the page is hosted with the information we want to visit.
There are many domains with restrictions, which means that it is only possible to buy them if you meet certain criteria or if you have the authorization to register.
Domain extensions in general are available to everyone, even the vast majority of top-level domains (ccTLDs) are available to anyone interested, even if they do not live in the country that manage / delegate it.
Yes. Businesses often register different domains to expand their brand name. Registering several domains and covering good names increases the chances of new customers finding you online and improve your main domain name with a better search engine optimization.
There are several things to take into account when registering a domain name, the most important are: brand name, location and related keywords.
Each new domain registration must be focused with a final goal, so the combination of these 3 qualities must be taken into account when choosing the name.
For example, if we want to position our brand and the location where the business is, a possible domain name would be; localname.com, where "local" will be the city, name the brand, and followed by the extension.
It is essential to keep in mind that a short name domain name helps your visitors remember it, just as a well-composed descriptive domain name helps in your search engine optimization (SEO).