TLS (SSL)
TLS ensures the privacy and data integrity between two communicating points across a network. Originally known as SSL, TLS is not only important when transferring sensitive data (such as personal or payment information) but also for websites/applications in general. Google has also announced that fully HTTPS websites/applications will have SEO priority.
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DNS: Domain Name System (Domain Name Server)
DNS is a vast protocol that is essentially its own subject entirely, however, within the scope of this document it is only important to understand the basics of DNS and how it is used when dealing with CDN vendors.
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Configuration
Referring back to Diagram 1, once requirements and add-ons have been decided, it is now time to look at customization.
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Many to Many
Many applications that require many CDN configurations. These may or may not (but most likely do) reside across multiple origin servers. Most common in complex setups where a single application cannot serve the purpose of the whole website. As an example, this is commonly seen on trading or very large retail websites where each part of what may look like the same website/application are actually designed, implemented and managed by multiple teams across a business.
Many to One
More than one application can use the same CDN configuration. Many applications are designed on a template and differ only in content but not so much design. These applications can share the same CDN configuration.
One to Many
A single application that requires more than one CDN configuration. This is usually due to elements within an application using different domains for different reasons.
One to One
A single application requires a unique CDN configuration but may use a variety of origin servers.
CDN Models
Mapping website/application can be mapped to more than one CDN configuration or more than one application can be mapped to a single CDN configuration.
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What is a CDN?
CDN enhances web performance, requires early planning, and follows OSI model.