n mission critical business area such as smart office, SNS, online shopping, banking, games, etc., it is very important to deliver applications seamlessly and efficiently to users. ADCs (Application Delivery Controllers) enhance the performance of web-based and related applications for end users by providing a suite of services at network and application layers. PIOLINK PAS-K is an upgraded ADC version of PAS with improved performance and enhanced features. -Application proxy technology to conduct more intellectual load balancing. -Application optimization and acceleration such as caching, compression, and SSL acceleration. -Application security features to secure delivery safety Application Availability & Security An ADC is a controller that efficiently delivers applications. One of its main features is to balance loads to secure stability and resources of devices such as servers, firewalls, and VPN by sending tremendous traffic in a balanced way. It enables construction of disaster recovery centers and cloud data centers with Global SLB. As dualization techniques for high availability (HA) have been applied, it increases customer trust offering services with ‘no suspension and no failure.’ Application Acceleration In order to improve the application transmission efficiency, it supports various advanced acceleration features. It increases end users' satisfaction and trust by improving service quality. For companies, it improves resource efficiency by reducing server resource loads. PAS-K supports advanced acceleration features including memory caching, compression, connection pooling, and SSL offloading. Application Security It supports advanced security features for application data and system stability. In addition, it is prevents DoS attacks such as Syn attack, Get flooding and various external attacks including Layer 7 filtering. Network Virtualization Virtualization techniques are mandatory for building cloud computer infrastructures, known as their centralization, efficiency, and mobility. Along with virtualization of servers, storage, and desktop, the effects of building cloud infrastructures can be maximized by virtualizing ADC, which is a core solution of AND (Application Delivery Network). PIOLINK offers safe delivery by dividing a single PAS-K into multiple virtualized devices.