Explanation and definition of DNS cache
A DNS cache is a temporary cache memory used by DNS resolvers and other devices to store data. The DNS records that were initially applied to the domain names that were searched are kept in memory. These records contain information such as domain names’ IP addresses (IPv4 or IPv6), details about their email servers, services, authentication, verification information, and more. The DNS cache will save all of the data. However, as previously said, it will only last briefly because each DNS record has a TTL (Time to Live) value.
It is significant to notice that the DNS cache will momentarily contain all of the records for the different domain names. This is because the administrator sets the TTL (Time to Live) value, which determines how long it will last.
Users’ DNS queries can get faster responses thanks to this method, which also aids in effective resource optimization.
DNS downtime: Meaning
A DNS outage, also known as DNS downtime, is when the DNS is not functioning correctly. This implies that the IP address won’t be visible if you look for the domain name. Users will instead utilize DNS requests to find your domain. The domain’s authoritative nameserver will be requested by the DNS recursive server, but it will not respond and instead receive an error message.
How can a DNS outage affect your company?
Do you know what is exciting? Waiting hours and even days at a time, pressing refresh!
Said no one ever. Waiting is a daunting task nobody likes, but sometimes, there is nothing that you can do. When it comes to DNS, DNS propagation is the time to refresh, and it depends on an important factor. Would you like to know which?
Why the DNS propagation takes so long?
TTL is really obligatory if you are using the Domain Name System. It is like an expiration date for DNS records. How it works, and can you check it, we will see later. Let’s start.
One of the most important DNS records to understand and know is the MX record. Any activity you want to perform that involves domains requires DNS records. So, let’s look at what it’s for and why it’s necessary.
From what we know, there are a lot of DNS record types. They are a critical component of the Domain Name System process. In this article, we will define them and discuss which types of records are most important.
DNS record – what is it?
DNS records are text instructions kept in zone files that allow domain names to be resolved to IP addresses (A record and AAAA record). They are very light and simple to edit (if necessary) and depend on the type of query. In view of the fact that computers are not human, they use records to understand and read texts. That is, they convert the written file into numbers that machines can interpret.
Choosing a quality DNS provider is an important decision. If your next plan is to conquer the Internet, you definitely need DNS infrastructure to land in the cyber world. The DNS will be the foundation to build your business. That’s why you have to make an informed choice.
There are different aspects to consider, but here you have 5 tips that can guide your search!
1. Always check the servers’ location
As a business owner, you must clearly know your target market. While looking for a DNS provider, the objective must be that you could be as close to your clients as possible. To have DNS servers close to your market accelerates essential factors for your domain like the DNS resolution, loading time, etc. For example, if you are interested only in the European market, don’t waste time with a provider that offers a solid network all around the USA.
We will explain to you how to start using Dynamic DNS, no matter which router you have at your disposal. Of course, the steps might be a bit different, but still, this guide will be helpful, and you will be able to follow it.
DNS zone file
DNS zone file, also known as the master file (RFC 1035), is a simple text file that defines a particular DNS zone by including all DNS resource records (RR) for that zone. This DNS zone file is located on the primary name server. Any changes to the domain name are performed at the primary DNS zone that is located in the primary name server. They are modifications to the DNS zone files. Adding or removing DNS RR will change the content of the zone file.
What is the Domain Name System?
The Domain Name System, or shortly DNS, is an infrastructure that brings simplicity for humans to using the Internet as we know it in present days. It has extensive functionality. However, at its core, it holds a database with all of the domain names that exist and their associated IP addresses.