USB hub - Wikipedia
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USB
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MPT USB-CBBH 4-Ports Flexible Self Powered Mini USB 2.0 Hub – 4 x 4-pin Type A USB 2.0 USB Downstream, 1 x 4-pin Type A USB 2.0 USB Upstream – External – Wulus
Overview Features Description
USB hub - Wikipedia
display - What do the upstream/downstream USB ports on a monitor do? - Super User
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ONNTO Corporation
What do the upstream/downstream USB ports on a monitor do? - YouTube
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