Chapter 3 Design Figure 3-9. HTTP accelerator, web cache, and web server Varnish cache along with the web server is a unique combination that will deliver content faster. You can choose any web server such as Microsoft IIS, Nginx, or Apache web server according to your needs and requirements. As shown in Figure 3-9, the client requests to Varnish and Varnish replies static content to the client or passes the request to the web server if the requested content is not cached in the Varnish cache. Varnish along with the web server is able to provide load balancing, proxy server, web serving, security controls, and monitoring services features. Integration Layer The DXP’s integration design integrates data, applications, and people together through a common business process, for example, information portals, common business functions, service-oriented architecture (SOA), or distributed business processes. There are two types of integration: loosely coupled and highly coupled. 77