Canonical Name Record or Alias Record. A type of resource record in the Domain Name System (DNS) that specifies that one domain name is an alias of another canonical domain name. For example, CNAMEs are often used by CDN customers to repoint domain names they own to CDN domain names
Content Delivery Network (CDN) is a data network optimized for the delivery of content, e.g. video, at a large scale. Comprised of both hardware and software components.
Load balancing is, as the name suggests, generally instituted to balance load among a set of resources. It is a specific case of load sharing. In the CDN space this might mean balancing load within a single CDN or it might relate to balancing load across multiple CDNs.
Cache server located in front of the origin servers in order to enhance their capabilities and offer content to an increasing number of CDN origin access points without increasing the number of origin servers. The downstream CDN elements will fetch the object from the shield cache rather than pulling from
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