![]() The interesting thing to note here is that each INTERNAL PORT is connected to only 1 EXTERNAL PORT, however each EXTERNAL port might be connected to more than 1 INTERNAL PORT for providing different speed standards. And finally each INTERNAL PORT is mapped to one EXTERNAL USB PORT that you can see with your eyes on the sides of a laptop or behind of pc case and plug your devices into.ġ External Physical Port connected to many Internal Ports If there was no INTERNAL HUB, you would need a separate controller for each usb port which would be make the circuitry bigger and more expensive.Įach INTERNAL HUB houses multiple INTERNAL PORTS each of which can runs at a different speed. Now a USB Controller (inside the computer) is connected to an "INTERNAL HUB" (again somekind of ic chip) which allows connections from multiple USB ports to access the USB Controller. ![]() ![]() What are Internal HUBs and Internal Ports Inside your computer there is something called a USB Controller which is an IC chip that enables the system to use usb technology and transfer data across compatible devices.
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