Horizon Agent - A software service that is installed on all guest virtual machines, physical systems, or RDS hosts to allow them to be managed by Horizon 7.
Horizon Client - Communicates with View Connection Server to enable users to connect to their desktops.
View Connection Server - Acts as a broker for client connections by authenticating and then directing incoming user requests to the appropriate virtual machine, physical system, or RDS host.
Horizon Administrator - Enables administrators to configure View Connection Server, deploy desktop and application pools, manage machines, control user authentication, initiate and examine system events, and perform analytical activities.