What is a CDN and how does it work? CDN is a content delivery network (CDN).
That refers to a group of geographically dispersed servers. That work together to provide fast delivery of content.
The popularity of WordPress CDN services continues to grow. And today most Internet traffic is served through CDN,
Includes traffic from major sites like Facebook, Netflix, and Amazon.
Properly configured CDNs may also help protect sites from common malicious attacks. Such as DDOS Distribution Denial of Service attacks.
- Is CDN the same as web hosting?
- What are the benefits of using a CDN?
- How does a CDN work?
- How does a CDN improve a site’s load times?
- Reliability – How does CDN always keep a site online?
- Information Security – How Does a CDN Protect Data?
- Example of a CDN
- What does CDN mean in the real world and why do you need it?
- Without and with CDN
Is CDN the same as web hosting?
While CDN does not store content and cannot replace the need for proper web hosting.
It does help cache content on the web, which improves site performance.
Many websites struggle with traditional hosting services to meet their performance needs. Which is why they choose to use CDN.
By utilizing the cache to reduce the storage bandwidth of hosting. Helps prevent service disruptions, as well as improve security,
WordPress CDN is a popular choice to improve your website speed before enhancing your website hosting package.
What are the benefits of using a CDN?
Although the benefits of using a CDN vary depending on the size and needs of a website,
The main benefits for most users can be divided into four different components:
- Improving site load times – By distributing content closer to site visitors using a CDN server. Located in the same country of the target audience, visitors experience faster page load times.
As visitors are more likely to stay away from a slow loading site. CDN can reduce entry rates and increase the amount of time people spend on the site. In other words, a faster site means more visitors will stay longer.
- Reducing Bandwidth Costs – Bandwidth consumption costs for web hosting are a major expense for websites. Through cache and other optimizations. The CDN network is able to reduce the amount of data that the source server must provide.
Thereby reducing hosting costs for publishers.
- Increasing the availability of content -Large amounts of traffic can interfere with the normal functioning of the site.
Thanks to the nature of the CDN network it can handle more traffic. And withstand better hardware failure than many source servers.
- Improving Site Security – CDN may improve security by providing reduced DDoS attacks, enhancements to security certificates, and other optimizations.
How does a CDN work?
At its core, CDN is a network of servers linked together with the goal of delivering. Content as quickly, cheaply, reliably, and securely as possible.
In order to improve speed and connectivity, CDN has stable servers at switching points between different networks.
These internet exchange points (IXP) are the main locations where different ISPs connect. To provide each other with access to traffic originating from their various networks.
By connecting to these places at high speed and linked to each other, a WordPress CDN provider. Is able to reduce costs and transit times in high-speed data transmission.
Beyond server location in IXPs, CDN performs a number of optimizations in standard client/server data transfers.
CDNs place data centers in strategic locations around the world, improve security, and are designed to survive various types of Internet failures and congestion.
How does a CDN improve a site’s load times?
When it comes to content loading sites, users drop out quickly when a site slows down.
WordPress CDN services can help reduce congestion times in the following ways:
- The worldwide distribution of CDN means reducing the distance between users and site resources. Instead of having to connect to wherever a site’s source server may live, CDN allows users to connect to a geographically closer data center. Less travel time means faster service.
- Hardware and software optimizations such as efficient load balancing and solid state hard drives can help data reach the user more quickly.
- CDNs can reduce the amount of data transferred by reducing file size through tactics like minification and file compression. Smaller file size means faster load times.
- CDNs can also speed up sites that use TLS / SSL certificates by optimizing connection reuse and allowing TLS to start incorrectly.
Reliability – How does CDN always keep a site online?
Working time is a critical component for anyone who has a website.
Hardware glitches and jumps in motion, as a result of malicious attacks or just increasing popularity,
It has the potential to crash a web server and prevent users from accessing the site or service.
A well-rounded CDN has several features that will minimize downtime:
- Load balancing distributes network traffic evenly across multiple servers, facilitating the size of the fast growth in traffic.
- Intelligent failure provides uninterrupted service even if one or more CDN servers go offline due to a hardware failure; The failure can redistribute the traffic to the other operating servers.
- In the event that an entire data center has technical issues, routing Anycast forwards the traffic to another available data center, ensuring that no user will lose access to the site.
Information Security – How Does a CDN Protect Data?
Information security is an integral part of CDN.
CDN can maintain a secure site with fresh TLS / SSL certifications that will ensure a high level of authentication, encryption, and integrity.
Examine security concerns around CDNs and explore what they can do to deliver content securely.
Example of a CDN
Imagine a US retailer looking to expand into the East Asian market.
When an Asian user surfs the front of his e-commerce to check product availability, real-time data must be retrieved from a diverse array of enterprise systems.
It may be necessary to integrate required data into systems that cover pricing, marketing, sales, logistics/warehousing, and customer service databases and applications.
In traditional architecture, this data will have to travel from the company’s original site to the relevant regional IXP,
Across the Pacific to another IXP to the relevant region in Asia, then finally to the ISP and end-user device.
Even assuming optimistic assumptions about hardware usage time, bandwidth, and speed at each stop along the way,
This type of circular route is sure to lead to increased latency.
By deploying a CDN, this company can make a clumsy digital experience for Asian users
For a better experience is able to support dynamic marketing and support strategies.
What does CDN mean in the real world and why do you need it?
Suppose you own a website that is hosted on a web server (the source of the content) and submit images of inspirational quotes to visitors to the site.
When you set up your site, you hosted it in a specific geographical location, say in the UK.
Initially, when the site started, you may see a UK visitor visiting your site to see and download content.
As your site becomes more popular, more and more users from the UK and abroad are starting to access your site.
The CDN network helps you with a new audience from different locations
First, as more users access the same web server, the load on the webserver increases, and it will not be able to serve all users at once,
And it causes a bad user experience in accessing your site.
Second, because the source server is in the UK, users access it while encountering latency because the data is transmitted over the Internet from a geographical location.
The third challenge is the cost of bandwidth you have to pay to submit content from the source server because a larger number of users require more bandwidth to submit the content.
These three challenges can be addressed through CDN.
Because CDN is a network of geographically distributed servers for content delivery, it acts as an intermediary between the end-user and the source server.
For the first challenge, once a user accesses the site, the request is sent to the most appropriate node for content delivery, and then it is submitted from WordPress CDN nodes on the same principle as described above.
Therefore, in this case, instead of sending all requests from all users to the source server,
It is sent to the distributed nodes and the load on the source server goes down.
Without and with CDN
Towards the second challenge, WordPress CDN will be able to face the challenge as CDN nodes are distributed across different places in the world.
This way users get information by nodes according to their geographical location,
Hence the distance from the source server does not create the problem as long as CDN nodes are available.
In the third ownership challenge, CDN can reduce the bandwidth requirement for the server because all requests are not sent back to the server.
A CDN node is usually much cheaper in terms of bandwidth cost than the source server.
Further to cost optimization,
You can choose the node location of the least expensive CDN server in terms of bandwidth/cost to serve the content.