In the realm of the Internet and network infrastructure, Domain Name System (DNS) plays a pivotal role in ensuring seamless navigation and accessibility. As a student deeply immersed in the complexities of network management, I find it essential to comprehend the most common DNS record types. These records constitute the backbone of how the Internet translates human-readable domain names into IP addresses, and vice versa.
A Records (Address Records)
The A Record, or Address Record, is responsible for mapping a domain name to an IPv4 address. This is what helps browsers and other internet services to translate a URL like ‘www.example.com’ into an address that the computer can understand.
Currently, requesting a website seems the easiest thing for users, no matter their geographical location. But the process for this task to be successfully executed is complex. Many actors get involved in the Domain Name System (DNS) scene for users in the world to navigate the Internet easily. Today, we are introducing Recursive DNS servers.
What do Recursive DNS Servers do?
Recursive DNS servers, also called DNS resolvers, are the type of servers that get DNS queries from users and have the responsibility of resolving them by searching for the necessary DNS records in the DNS namespace.
Let me show you a very simple way to improve your website’swebsite’s reliability – Anycast DNS. You can have multiple DNS servers with the same IP address and speed up your domain resolution greatly. Here is how.
Why should you care about DNS?
DNS is the system that makes it easy for all of us to use the Internet. It translates the domain names to their IP addresses. That way, it distributes queries to the right places. For example, if you search for Google.com, your browser will have the task of using DNS to search for the correct DNS server and find the IP address of Google so that you can connect to it. In a traditional scenario, a single Primary DNS server will answer all queries for a domain name. But you can improve that by having multiple servers which can answer the query. So here comes the Anycast DNS.
DNS for CDN – the topic of today’s article. We will explain what the relationship between them is and what DNS and CDN mean. So, let’s get deep into this.
Definition of CDN
CDN is an abbreviation for Content Delivery Network, and it refers to a large network of servers located in various geographical locations. The fundamental goal of these servers is to cover a large area and respond quickly to potential users’ requests. The required information, such as photos, video, and code, is stored in the cache memory of each server. They also want to be as close to the users as possible. As a result, the service is better and faster. Furthermore, the CDN has the additional benefit of load balancing. As a result, the performance of the primary server is improved, and the strain on it is reduced.