Articles : High Availability (2)


ADC vs CDN: What are the Differences?

by Dave Blakey on Tips and Tricks • September 30, 2018

Content Delivery Networks (CDNs) and Application Delivery Controllers (ADCs) have many similarities and many differences. We are often asked about various CDNs and how they work with or compete with Snapt’s ADCs. Below we discuss the primary differences between a CDN like Cloudflare and an ADC like Snapt Aria or Snapt Nova. CDNs provide security in a distributed fashion and traffic optimization at the edge closer to clients. ADCs provide security, advanced visibility, monitoring, and load balancing capabilities in your data center infrastructure.   ADC CDN Location ADCs are located within your infrastructure and as close as possible to your servers.  CDNs are located outside your infrastructure and as close as possible to the end-user.  Load Balancing Fully featured and provides monitoring, full Layer 7, and support. Basic load balancing functions located outside your data center; is great for co-location load balancing.  Web Acceleration Rewrites, optimize, and caches page content. Rewrites and optimizes page content, and caches content much closer to the end-user. Security Provides SSL and WAF. Will protect during a DoS attack.  Provides full protection against DDoS attacks. Visibility In-depth and live monitoring of performance, stats, and metrics. Much less accurate due to Internet latency between CDN infrastructure and your data center. Redundancy Provides redundancy in your data center infrastructure.  None: CDNs cannot assist here as they are located outside your data center.

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