Application Delivery Controller

Intelligent Application Traffic Management

The RightWorkloads in the Right Places

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    Intelligent Application Traffic Management
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    The RightWorkloads in the Right Places


Its a device that is typically placed in a data center between the firewall and one or more application servers (an area known as the DMZ).


Performe application acceleration and load balancing between servers


F5, Citrix

How ADC can help modernize your IT

Application Delivery got its start in the form of network-based load balancing hardware. It is the essential foundation on which Application Delivery Controllers (ADCs) operate. The second iteration of purpose-built load balancing (following application-based proprietary systems) materialized in the form of network-based appliances. These are the true founding fathers of today's ADCs. Because these devices were application-neutral and resided outside of the application servers themselves, they could load balance using straightforward network techniques. In essence, these devices would present a "virtual server" address to the outside world, and when users attempted to connect, they would forward the connection to the most appropriate real server doing bi-directional network address translation (NAT).
Load Balancing Demand Drivers
The entire intent of load balancing is to balance the incoming network or application traffic across many physical servers—and make those servers look like one server to the outside world. There are many reasons to do this, but the primary drivers are the need for "scalability," "high availability," and "predictability."

Scalability is the capability of dynamically, or easily, adapting to increased load without impacting existing performance. High availability (HA) on the other hand, is the capability of a site to remain available and accessible even during the failure of one or more systems. Service virtualization (imitating the behavior of software components to accelerate and test application development) presents an interesting opportunity for both scalability and availability. If the service or point of user contact is separated from the actual servers, the application can be scaled by adding more servers. Moreover, the failure of an individual server will not render the entire application unavailable. Predictability is a little less clear as it represents pieces of HA as well as some lessons learned along the way. It can best be described as having control on how and when the services are being delivered with regard to availability and performance.
Spending on Private Clouds
is growing at 18.3% per year
How Many Org. Depends on Apps?
98% of Organizations
Network-Based Load Balancing Hardware
The second iteration of purpose-built load balancing came about as network-based appliances. These are the true founding fathers of today's Application Delivery Controllers. These appliances physically resided outside of the applications themselves and though they started as load balancers, achieved their load balancing using much more straightforward network techniques like NAT. These devices would present a virtual server address to the outside world and when users attempted to connect, the devices would forward the connection on the most appropriate real server.
Easiest Deployment for Private Clouds
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Revolutionize your application delivery
By leading ADC

In today’s dynamic world, organizations constantly face the challenge of delivering critical applications to millions of users around the globe. It is extremely important that they deploy network and application services to make apps scalable, secure, and available. This is one of the prime reasons behind the evolution of Application Delivery Controllers (ADCs). However, none of these features can be implemented without a firm basis in basic load balancing technology. So, let’s begin with understanding the importance of load balancing, how it leads to efficient application delivery, and how ADCs are still evolving and embracing the cloud-first world.
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with consistent application services and security”

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