the device.
A USB host controller is a piece of hardware. It is usually incorporated into the southbridge in your motherboard. As such, it cannot be downloaded. If you want to upgrade a low-speed USB controller to a high speed controller you will have to buy a new high-speed controller. Changes are the old controller is not removeable and not upgradeable.
host controller
Typically it is a usb port 2.0.
127 USB devices are supported by one host controller.
USB Will allow up to 127 devices per host controller. Usually, a host controller has more than one USB port. The host controller will only allow 127 devices in total (including hubs), so you can not have 127 per port.
Host controller
USB: Universal Serial Bus. A standard device that connects to a host computer
You plug the controller directly into the PlayStation with a USB cable and hold the PS button until it connects.
If you have Windows XP Service Pack 1 (SP1) then you can add USB 2.0 drivers to enable the USB host controller to operate at USB2.0 speeds. Windows XP Service Pack 1 is released with USB1.1 (slow) host controller device drivers. From SP2 and onwards USB2.0 is supported by default. See the related link for more info about why USB 2.0 operate at USB 1.1 (slow) speed.
If you're using older drivers you won't be able to use high speed. Check to see if there are newer drivers available for your USB ports.
Yes there is. Buslink makes a 4 port PCMCIA USB 2.0 Host controller, fo about $28. You can find one at http://www.mypcgoodies.com/details.asp?item=HM09101%2D1
A router is a device that connects to your modem to share your internet connection with other computers. A wireless router uses a power cord and an Ethernet cable to connect from the modem to the router without the need of a connection between the router and the computers it's sharing the Internet connection with. A USB wireless router connects to the modem using a single USB connection that serves as both the power supply and data connection.