BenQ RM8602K Installation Handbook - Page 18

Additional information Your LCD display provides USB 2.0 ports for connecting to various devices including computers, flash drives and wireless LAN adapters. This section provides basic information about the USB 2.0 interface and serves as a reference for the deployment of your USB connections. USB terminology Term Host, Function Description/explanation A USB network consists of one master and multiple slave devices in a star topology as illustrated below: Tier 1 (root tier) Host Root hub Tier 2 HHub AA Function Function Tier 3 Function Function Function HHubb AB Tier 4 Function Function HHuub AC Function Tier 5 Function HHuub AD Function Function Tier 6 Function Function HHubb AE Function Tier 7 Function Function Function HHuubb AF The master device (referred to as the "Host") is on top of all other slave devices (called "Function"). A computer is the most common USB host. Any device that has a USB host controller and related hardware and software installed can also become a USB host. A USB function can be a USB mouse, keyboard or storage device. A maximum of 7 tiers (including the root tier) are allowed in a single USB network. Note that a USB device that performs both as a hub and a function occupies two tiers. 18 Display installation guide