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Products (14)


LoadMaster Series by KEMP Technologies

KEMP Technologies is the #1 price/performance network server load balancer and application delivery controller, used by thousands of businesses who consider IT, e-commerce, web and business applications as mission-critical to their long-term success. KEMP Hardware & Virtual Load Balancers help companies rapidly grow their business by providing 24/7 infrastructure availability, better web performance and secure operations – while streamlining IT costs. KEMP Server Load Balancers are affordable, yet feature rich server load balancers with integrated SSL acceleration, layer 7 content switching, caching, compression and much more.


Alteon NG by Radware

What Does Alteon NG Do?

Alteon NG is our next generation application delivery controller (ADC) and the only load balancer that guarantees application SLA. It provides advanced, end-to-end local and global load balancing capabilities for all Web, cloud and mobile based applications. Alteon NG load balancer combines best-of-breed application delivery plus advanced services to companies with key application infrastructure challenges affecting web applications such as heavier, more complex web content; mobility and BYOD; and the migration to the cloud.

What Makes Alteon NG Better?

Alteon NG is the industry-only application delivery controller built from the ground up to ensure application SLA. Unlike a standard, legacy load balancer that's based on a best-effort approach, it provides full application SLA assurance through reserving resources per application, allowing adding new services without performance penalty, real-user monitoring, best-in-class application acceleration features and innovative security offering.


BIG-IP Family by F5 Networks

The Power of One

The BIG-IP family of products offers the application intelligence network managers need to ensure applications are fast, secure and available. All BIG-IP products share a common underlying architecture, F5's Traffic Management Operating System (TMOS), which provides unified intelligence, flexibility and programmability. Together, BIG-IP's powerful platforms, advanced modules, and centralized management system make up the most comprehensive set of application delivery tools in the industry.


ADX Series by Brocade

The Brocade ADX Series of application delivery switches is used by the world's most demanding service provider networks and large enterprise data centers. With a comprehensive portfolio and features, the Brocade ADX Series enables service provider and enterprise organizations to scale network performance, deploy services more efficiently, and differentiate service offerings without compromising on performance and reliability.


NetScaler by Citrix

Powered by Citrix TriScale. Recommended by Cisco.

Citrix NetScaler is an all-in-one web application delivery controller that makes applications run five times better, reduces web application ownership costs, and makes sure that applications are always available. It is deployed in thousands of networks around the globe to optimize, secure and control the delivery of all enterprise and cloud services and maximize the end user experience for all users including mobile clients. Cisco and Citrix have announced the evolution of a network services strategy for virtual and cloud networks that will integrate the market-leading Citrix NetScaler virtual application delivery controller into the Cisco Unified Fabric Cloud Network Services portfolio. The Cisco ACE replacement product, Citrix NetScaler 1000V, is tightly coupled into Cisco’s virtual networking framework to provide superior network service provisioning and performance.


FortiADC by Fortinet

The FortiADC line of hardware and virtual Application Delivery Controllers provide unmatched Server Load Balancing performance whether you need to scale an application across a few servers in a single data center or serve multiple applications to millions of users around the globe. With included SSL Offloading, HTTP Compression, Global Server Load Balancing, Firewall and Link Load Balancing, they offer the performance, features and security you need at a single-all inclusive price. Advanced models include 10-GE SFP+ ports, hardware-based SSL ASICs, dedicated management channels and dual power supplies to meet the demands of datacenter environments with L4 throughput up to 50 Gbps. Highlights -L4 throughput from 2.7 Gbps to 50 Gbps. -Delivers 99.999% application uptime with intelligent server load balancing. -Intuitive L7 policy-based routing to dynamically rewrite content to support complex applications and server configurations. -Hardware and software-based SSL offloading reduces the performance impact on your server infrastructure. -Multiple failover options for high availability ensures your applications continue to perform even if there is a hardware failure. -An intuitive GUI and full CLI that’s easy to use and manage with set up time taking less than an hour for most server environments. -Included Global Server Load Balancing distributes traffic across multiple geographical locations for disaster recovery. -Link Load Balancing distributes traffic over multiple ISPs to increase resilience and reduce the need for costly bandwidth upgrades.



SANGFOR Application Delivery (AD) has developed its technologies to help you address both link and server load balancing problems. Thus enhancing service availability while minimizing  the IT cost, securing the service continuity and users' experience:

  • The link load balancing technologies provide redundant links backup and smart routing for the inbound and outbound traffic;
  • The server load balancing technologies smartly assign connections to the most appropriate servers;
  • The Business Intelligence (BI) analysis monitors the whole data process including user, link, server and application service. It analyzes in detail all the elements involved in the application delivery 



Thunder ADC by A10 Networks

Thunder ADC A10 Thunder™ ADC product line of high-performance, next-generation application delivery controllers enables customers' applications to be highly available, accelerated and secure. Thunder ADC is our premier ADC product line, delivering performance scalability up to 150 Gbps, the broadest range of form factors (physical, virtual and hybrid), and expanded system resources designed to support future feature needs. The A10 Thunder ADC product line is built upon A10's Advanced Core Operating System (ACOS®) platform, with our Symmetric Scalable Multi-Core Processing (SSMP) software architecture that delivers high performance and a range of deployment options for dedicated, hosted or cloud data centers.


SteelApp for Application Delivery Control & Scalability by Riverbed

Formerly Known As: Stingray

A family of application delivery products that provide visibility and control of traffic to and from applications, enabling fast, reliable, and secure application delivery to users anywhere from the cloud or datacenter. It is a complete software-based Layer 7 application delivery controller (ADC) with integrated web content optimization (WCO) and web application firewall that enables companies to quickly and securely delivery applications where and when they are needed in an elastic manner. Riverbed’s unique approach automates the deployment, licensing and metering of application delivery services, making possible an “ADC per application” delivery model in which isolated resources and costs for ADC-as-a-Service can be allocated to each client application. This unique approach reduces costs and time to production while enabling rapid change and scale for data center applications.

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Buyer’s Guide for Application Delivery Controller (ADC)

Introduction to Application Delivery Controllers (ADCs)

The Internet industry, the business software solutions industry, data centers, and the cloud computing market are all-important drivers of our modern economy. As with the dot-com bubble during the 1990s, people’s dependency on the Internet is now at a peak. Server networks, data communication infrastructures, software application programs, and computing devices like smartphones, laptops, desktop PCs and other advanced computing gadgets are all working together to provide to the consumer world the power of Internet technology. From a technical perspective, however, every company that provides online services today is facing the challenges of traffic management and data security. These are clear issues with big data, and they are capturing the attention of every company so that they seriously take into consideration these aspects of server management.

Related to this, there is a technology, which has been helping millions of companies since the 1990s, and it is called “Load Balancing.” Every IT professional who has been working on server management certainly knows this technology. Load balancers were improved further at the turn of the millennium, becoming “Application Delivery Controllers” or ADCs. An ADC’s primary function is to provide the ability to direct Internet users to the best performing and most accessible servers; and load balancing is just one of an ADC’s many features.

The ultimate reason why we created this Buyer’s Guide is that we want to guide every company today in choosing, investing in and implementing the right ADC solution. Whether you’re an ADC solution provider, a corporation using business workflow applications, or a small business looking to expand your network capacity, you will definitely get advice from the latest information, strategies and solutions we will be covering in this Buyer’s Guide.

  • What is an Application Delivery Controller (ADC)?
  • History of Application Delivery Controllers
  • Types of Application Delivery Controller Applications
  • What Common Problems Do Application Delivery Controllers Solve?
  • Key Application Delivery Controller Features
  • Selecting the Right Application Delivery Controller
  • Benefits of Application Delivery Controllers
  • Pricing
  • Market Trends

What is an Application Delivery Controller (ADC)?

Before, it was Load Balancing technology. Today, it’s Application Delivery Controllers (ADCs). ADC is an advanced load balancer. It manages client connections to complex Internet-based and enterprise applications. As the name also suggests, it is a controller device that is placed between the web servers and the Internet, and then it acts as a single point of control. However, sophisticated ADCs also come in the form of software programs which function similarly to device controllers. An ADC manages or directs the flow of data in the Application Delivery Network (ADN). In today’s many data centers, the main role of ADCs is to reduce the workload on the web servers.

History of Application Delivery Controllers

The load balancing market was born during the 1990s. More commonly known as Server Load Balancing (SLB), this technology was pioneered by many of the would-be dot-com millionaires and billionaires. During that time, most start-ups were looking for server hardware solutions that would best fit into their small budgets. In the early years, they were content enough with the standard, off-the-shelf, PC-based servers. But as the number of Internet users (their customers) started to explode, they began to experience huge volumes of traffic to their websites, to the point where their servers could no longer handle the demand. This was the time when load balancing technology came in. From the late 1990s to the middle of the 2000s, SLB served as a networking method that distributed the workload across multiple servers.

Before SLB, it was actually the round robin technology employed on Domain Name System (DNS) servers. DNS is a technique that translates human-readable website addresses or names to machine-readable IP addresses. This was then followed by proprietary load balancing in software and then by network-based load balancing in hardware. In the late 2000s, a sudden rise in the number of organizations that are dependent on web-based applications triggered many server manufacturers and software vendors to introduce Application Delivery Controllers (ADCs) – which are advanced load balancers.

Types of Application Delivery Controllers

Today’s modern ADCs are designed to focus on providing seamless server management processes that are crucial in servicing from millions to billions of Internet users across the globe. ADC functions this way: when one of the servers experiences failure or downtime, ADC will automatically take that server off-line and then re-route the active user to other working servers. Moreover, ADC software solutions are capable of delivering business applications based on the efficiency of the software itself, the CPU capacity of the server, or other appliance, and the behavior of the traffic that comes in and out of the network. It is from these parameters that solution providers are then able to derive more robust and scalable types of ADCs, which are the:

  • Appliance ADC
  • Virtual ADC
  • Cloud ADC
  • Bare Metal ADC

What Common Problems Do Application Delivery Controllers Solve?

For organizations that are using business workflow systems, the key role of ADCs for them is to make their applications perform faster. For large data centers, ADCs help minimize their system failures and downtimes. According to a recent survey, application and data center downtimes cost businesses up to as much as $5,000 per minute. The alarming truth here is that many companies, in the past several years, have permanently closed their businesses due to these upsetting losses. This dilemma and the other modern-day server management issues listed below are what most ADC solution providers want to resolve today:

  • Increasing web traffic, which leads to enterprises struggling to keep up with server demand

  • Security threats such as network breaches and malicious software attacks, which are giving companies a lot of headaches and worries, particularly about the privacy and reliability of their customer data

  • Network overloads, which restrict users from accessing their applications hosted on the cloud or on private servers

Key Application Delivery Controller Features

There are many internal and online server applications that mainly rely on the 24/7 availability of their server network. These applications include e-commerce websites, corporate email systems, collaborative intranet tools, ERP/CRM systems, and other web-based application programs and communication tools. What’s great about ADC technology is that even when server maintenance is ongoing, or a sudden system failure is encountered, the ADC sees to it that these applications will not be badly or totally affected. What makes this possible is the ADC’s sophisticated and robust features. These features play an important role in achieving optimal resource (bandwidth) utilization, maximizing throughput, minimizing response time and avoiding network overload.

The features below cover the aspects of application availability, acceleration capability, and security protection for different ADC solutions:

Core Load Balancing Features

  • Layer 4-7 Load Balancing
  • Content Switching
  • Caching, Compression Engine
  • MS Exchange 2010/2013 Optimized
  • Pre-configured Virtual Service Templates
  • IPS Engine
  • High Availability
  • TMG Replacement
  • GSLB Multi-site Load Balancing
  • RESTful API

 Server Appliance Features

  • Content Switching
  • SSL Acceleration
  • Data Compression
  • Data Caching
  • Intrusion Prevention
  • Single Sign-On
  • Pre-Authentication
  • Layer 7 Content Switching
  • Layer 7 Persistence
  • Application Security
  • SSL Offloading
  • WAN Optimization

More Advanced Features

  • Asymmetric Load
  • Priority Activation
  • Distributed Denial of Service (DDoS) Attack Protection
  • HTTP Compression
  • TCP Offload
  • TCP Buffering
  • HTTP Caching
  • Content Filtering
  • HTTP Security
  • Priority Queuing
  • Content-aware Switching
  • Client Authentication

 Detailed Application Security Features

  • Inbound Attack Protection
  • Outbound Data Theft Protection
  • Protection Against DDoS Attacks
  • Form Field Metadata Validation
  • Session Tampering and Riding

Selecting the Right Application Delivery Controller

ADC solutions have various names: server load balancers (SLBs), application front-end devices, application traffic managers, web front-ends, content and application switches. It is critically important that these various ADC names should not confuse future solution buyers like you. On the other hand, businesses that are investing in ADC solutions for the first time are strongly advised to conduct intensive research, thorough analysis, and systematic evaluation of the different ADC solutions available on the market. Server management architects and engineers, together with software experts and consultants, can help a company optimize its investment in ADCs.

When selecting the right ADC solution for your organization, you should focus your attention on these three important aspects:

Defining Your Basic Requirements

The choice between cloud-ready virtual appliances and physical appliances must be based on the real needs of the organization. These needs basically have something to do with the:

  • Number of incoming connections per minute
  • Bandwidth to manage
  • Amount of traffic generated by each server application
  • Number of application requests during peak hours
  • Requirements for content manipulation, data caching, data compression and SSL handling

Features and Functions Checklist

Finding the features that will best fit your organization's needs should also be at the top of your company's priorities. These features must completely match the functionality of your ADC system. Here are the items to consider when preparing your checklist:

  • Technical specifications of the solution

  • Solution to applications compatibility

  • Application-specific certifications

  • User and reseller reviews of the solution

  • Benchmark of value and performance versus cost

  • In-house skills and training requirements

  • Trial or evaluation of the solution

Documentation of Your Current Server Infrastructure

Whether it is going to be a large or small software deployment, you need to fully assess if your current server infrastructure and business environment are ready to handle and manage the soon-to-be changes. In other words, you should center your assessment not only on the server hardware and software but also on the people who are going to adapt the new system in the near future. Gather and document the facts and figures across your organization, and use these in evaluating your vendor of preference.

Benefits of Application Delivery Controllers

By carefully planning and then properly executing the entire ADC solution selection process, your organization will definitely gain plenty of benefits, some of which can be beyond your expectations. Here are the benefits that most industry experts, sellers and current users of ADC systems have been pointing out since the early days. ADCs can:

  • Improve network performance by distributing traffic among multiple servers

  • Optimize resources by efficiently allocating traffic based on application types

  • Ensure application and data access consistency

  • Improve user experience and reduce server overhead with SSL acceleration

  • Reduce single points of failure


Ensuring business continuity for line-of-business applications and supporting the overall system infrastructure are the top benefits offered by ADC solutions. The more comprehensive the solution, however, the higher the total cost of ownership (TCO) can be. We mentioned earlier that downtime in data centers can bring losses of up to $5,000 in just one minute. But despite this, the good news for future buyers like you is that there are proven and effective approaches for avoiding this kind of loss. One of them is to compute your Return on Investment (ROI). While we are not going to show actual ROI computations here, we are going to reveal to you the parameters that have a direct impact on the payback for your ROI. These parameters are as follows:

Number of Servers

On average, industry experts classify the size of a data center based on the number of servers that it is maintaining. On average, small data centers have around 125 servers. Medium data centers have 500 servers. Large data centers have 1000 servers.

TCO Contributors

Cost of hardware, software, management services, server power consumption, and server administration are all TCO contributors. The average cost of a server today is around $2,500. The cost of ADC software ranges from $40,000 per 125 servers to $200,000 per 1,000 servers. Server administration costs roughly $300 per year per server. Each server can consume 150 watts of power at an average cost of 11 cents per kWh.

ROI Payback Period Calculation Methodology

According to industry experts, SSL offload, compression offload, and TCP multiplexing functionalities have direct effects on the ROI payback period. For small data centers, the payback on ROI for an ADC using SSL offload averages 22 months; using compression offload, it's around 34 months; using TCP multiplexing, it’s around 10 months. For medium data centers, these figures are 17, 25 and 7 months respectively. For large data centers, these figures are 14, 21 and 6 months respectively.

The ROI's offered by an ADC solution employing SSL offload, compression offload, or TCP optimization have been verified by many software experts.

Market Trends

Most buyers also want to know the current status of the ADC market because they know this information will guide them further in choosing the right solution. So the following is an overview of the ADC solution industry today:

ADC Market is Booming

In 2005, the ADC market was estimated to have been around $727 million. In 2012, it went up to $1.4 billion.  At present, it is estimated to be around the $1.5 billion to $2 billion mark.

Virtualization is on the Rise

A recent report shows that more buyers have still been buying hardware-based ADCs as compared with software-based ones in the past two to three years. However, this will not last long, because dedicated servers are now being replaced by virtualized servers, and their impact on ADCs has been very transformative.

As a whole, we can expect many more improvements in ADC solutions in the coming years. And whether it’s a physical, virtual or cloud-based ADC solution, with the help of applications and infrastructure experts, we believe that today is the perfect time to get the right ADC solution for your organization.