Horizon Client features have specific hardware and software requirements. Smart Card Authentication RequirementsClient devices that use a smart card for user authentication must meet certain requirements. System Requirements for Serial Port RedirectionWith the serial port redirection feature, end users can redirect locally connected serial (/dev/ttyS) ports, such as built-in RS232 ports or USB-to-Serial adapters, to their remote desktops. To support serial port redirection, your Horizon deployment must meet certain software and hardware requirements. Requirements for Using URL Content RedirectionWith the URL Content Redirection feature, URL content can be redirected from the client machine to a remote desktop or published application (client-to-agent redirection), or from a remote desktop or published application to the client machine (agent-to-client redirection). System Requirements for Real-Time Audio-VideoReal-Time Audio-Video works with standard webcam, USB audio, and analog audio devices. The feature also works with standard conferencing applications. To support Real-Time Audio-Video, your Horizon deployment must meet certain software and hardware requirements. System Requirements for Scanner Redirection End users can scan information into remote desktops with scanners that are connected to their local client systems. They can control scanner settings by selecting options in the remote desktop interface. To use this feature, the remote desktops and client computers must meet certain system requirements. System Requirements for Multimedia Redirection (MMR)With multimedia redirection (MMR), the multimedia stream is decoded on the client system. The client system plays the media content so that the load on the ESXi host is reduced. Requirements for Using Flash URL RedirectionStreaming Flash content directly from Adobe Media Server to client endpoints decreases the load on the data center ESXi host, removes the extra routing through the data center, and reduces the bandwidth required to stream live video events simultaneously to multiple client endpoints. System Requirements for HTML5 Multimedia RedirectionHorizon Agent and Horizon Client, and the remote desktops and client systems on which you install the agent and client software, must meet certain requirements to support the HTML5 Multimedia Redirection feature. Requirements for the Session Collaboration FeatureWith the Session Collaboration feature, users can invite other users to join an existing remote desktop session. To support the Session Collaboration feature, your Horizon deployment must meet certain requirements. Parent topic: System Requirements