Mini Unmanaged 2x 10/100/1000Base-T RJ45 to 1x 1000Base-X SFP Slot Gigabit Ethernet Media Converter, European Plug standard - FS.com Europe
Intellinet Gigabit Ethernet Media Converter (508544)
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What is Gigabit Ethernet (GbE)?
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10 Gigabit Ethernet - Wikipedia
USB 3 Dual Port Gigabit Ethernet Adapter - USB and Thunderbolt Network Adapters | Networking IO Products | StarTech.com
Lenovo Thinkpad Mini RJ45 To Gigabit 1000 Mbps RJ45 Ethernet LAN Network Adapter | eBay