KEMP Technologies, Inc. Application delivery controller (ADC)
ADCs are the next generation of load balancers, and are typically located between the firewall/router and the web server farm. An application delivery controller is a network device that helps sites direct user traffic to remove excess load from two or more servers. In addition to providing Layer 4 load balancing, ADCs can manage Layer 7 for content switching, and also provide SSL offload and acceleration. They tend to offer more advanced features such as content redirection as well as server health monitoring. An Application delivery controller may also be known as a Web switch, URL switch, Web content switch, content switch and Layer 7 switch.
| Price* (1st year support included) |
$ 1,590 | $ 5,990 | $ 8,990 | $ 17,990 |
| Core Features | ||||
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| Network ports | 4 X GbE | 4 X GbE | 8 X GbE | 18 X GbE |
| Max # of real servers / virtual servers | 1000/256 | 1000/500 | 1000/1000 | 1000/1000 |
| 99.999% HA with Active/Hot Standby |  |
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| Layer 4 load balancing |  |
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| Server resource / adaptive | |
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| SSL acceleration ASIC | |
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| Layer 7 content switching | |
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| Server health checking | |
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| Application health checking | |
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| L7 Support for MS Terminal Services | |
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| Web User Interface (WUI) | |
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| Performance | ||||
| Max Balancer Throughput | 300 Mbps | 1.5 Gbps | 2.7 Gbps | 6 Gbps |
| SSL Transactions Per/Second (TPS) | 100 | 1,000 | 3,000 | 10,000 |
| Layer 7 throughput | 250 Mbps | 1.2 Gbps | 2.3 Gbps | 5 Gbps |
| HTTP requests per second | 25,000 | 60,000 | 83,000 | 100,000 |
| Layer 4 concurrent connections | 1,000,000 | 2,000,000 | 4,000,000 | 30,000,000 |
* All specifications are subject to change without prior notice