CDN: Definition & Purpose

What is the concept behind CDN?

To access content, users connect to websites and applications from all over the world. People who are further away from a website’s servers, such as those in New York City, will receive content more slowly than those in the city. The user experience is inconsistent as a result. The content delivery network or CDN fixes the delay in the delivery of the content.

Users across many locations can access the website’s content quickly, reliably, securely, and effectively thanks to CDN (Content Delivery Network). It is composed of a dispersed group of servers located in various places. Major websites are able to do this and keep a duplicate of their website nearby for customers.

An edge server is a CDN server located closest to a user. For quick delivery and a better user experience, users are always connected to the closest edge server whenever they request material. For this precise reason, a lot of platforms today maintain their geographically relevant data close to the consumption area.

How advantageous CDN could be?

It could be really beneficial. Here are some of its main advantages:

  • Increase the speed. A visitor’s inquiries will all travel far less. The first secondary server that has the data in its cache must be reached from the users’ machines. Faster results come from shorter distances.
  • Higher uptime. The solution might be provided by the following cache server, even if one of them is down. Even in the worst-case scenario, there might not be any downtime because the cache on the other servers will still be functional.
  • Reduced bandwidth. The secondary servers will respond to the majority of visitor inquiries. The primary one will see less traffic as a result. Although the primary still needs to send information to the backup servers, there is still less bandwidth involved. particularly if we’re discussing vids.
  • Better Cybersecurity: Content delivery networks use automation and data analytics tools to detect firewall problems, Man in the Middle (MITM) threats, and DDoS (Distributed Denial of Service) attacks.

The Content Delivery Network is for whom?

It is open to all. Absolutely everyone can use CDN. Consider a media company, for instance. A content delivery network might be key to increasing your distribution if you already have one. It might also be beneficial for e-commerce websites, mainly if they serve a variety of markets, like the US. Alternately, it can be suitable if various nations, like the European Union, constitute your target market. Websites for blogs, news, online services, and a wide variety of other purposes are not exempt. It is entirely based on what you need.


One of the most crucial elements in assessing a website’s efficacy is its speed. Using CDN could result in enhanced user experience and performance. It won’t let you down if you give it a chance. Therefore, please don’t waste any more time and implement it into your system.

Get familiar with the most popular DNS record types

Today, we’ll look at the most important and fundamental DNS record types that everyone in this field should be aware of. To begin, DNS records are text files containing computer instructions. Furthermore, DNS servers store DNS records, which we use to connect websites to the outside world. So, let us now look at the most important ones.

A record

The A record, commonly known as an address record, comes first on our list. It is unquestionably the most popular form of DNS record. We utilize an A record to point a hostname to its IP address. We’re referring to IPv4 addresses (32-bit) when we discuss it. Also, a more recent AAAA record type uses IPv6 addresses (128-bit).

As a result, the A record for your website will include the host’s domain name (, IPv4 address, type (A), and TTL (time to live). It is the DNS record that is used the most.

NS record

The NS record represents yet another crucial DNS entry. The NS stands for nameserver. Furthermore, it functions as the nameserver’s ID card. And it specifies which NS server manages the DNS zone. Without it, the zone will be ineffective.

You must include the host in the NS record, just like in the A record. This time, though, you will direct it to the nameserver.

PTR record

The polar opposite of an A Record is a PTR Record. A Record maps a fully qualified domain name to an IP address, whereas a PTR Record does the inverse. It checks whether the server name is correctly associated with the IP address.

You must set up PTR records before using email servers. This will assist you with anti-spam, eliminating the problem with email delivery brought on by PTR record issues, logging, and a host of other things.

CNAME record

An informational component of a domain name system is a CNAME record. For example, the www prefix is often a CNAME record pointing directly at the domain, if you have ever visited a website with the prefix. One hostname is mapped to another domain using CNAME records, giving the second domain an alias. CNAME records are crucial as a result.

SPF record

TXT is one of the DNS resource records. It is mostly used to indicate facts about the area and give outside sources information. To authenticate emails, you must have it. For instance, a server sends an email to your internet service provider (ISP). The ISP can use an SPF record or dedicated TXT type record to authenticate the email. This record includes information on the trusted servers approved by your domain so that your ISP can determine the origin of an email and spot a forgery. SPF, or Sender Policy Framework, is the most common (but not the only) email authentication method.


Felicitations! You are now familiar with the fundamental DNS record types. Knowing them is vital if you want your Domain Name System to work properly. So, the best is yet to come.