なお,1Gbps 対応のものに比べると,アダプター本体は,やっぱり少し太めに感じます.手持ちの uni のアダプターと比較してみた様子が以下の通りです.ひとまわりくらい違います.
Photo by hyt.
利用雑感
もちろん対応が謳われている Windows と macOS では全く問題がなく両方とも使えますし,きちんと 2.5 Gbps でリンクアップします.また,速度もきちんと出ています.
対応が明言されていないものについても一応チェックした結果は以下の通りです.
iPad Pro 3rd gen. 12.9inch (iPadOS 18.2) : 利用可
Xperia 10 IV SOG07 (Android 14) : 不可
BOOX note Air (Android 10) : 不可
Ubuntu 24.04.1 : 利用可
なお,Linux での認識状況は以下の通りです.
USB-A to RJ45 の方は,
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EnlighterJS 3 Syntax Highlighter
$ lsusb
...
Bus 002 Device 003: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
...
$ lsusb -d 0bda:8156 -v
Bus 002 Device 003: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 0[unknown]
bDeviceSubClass 0[unknown]
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x8156 USB 10/100/1G/2.5G LAN
bcdDevice 31.f4
iManufacturer 1 Realtek
iProduct 2 USB 10/100/1G/2.5G LAN
iSerial 6 xxxxxxxxx
bNumConfigurations 3
....
$ lsusb
...
Bus 002 Device 003: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
...
$ lsusb -d 0bda:8156 -v
Bus 002 Device 003: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 0 [unknown]
bDeviceSubClass 0 [unknown]
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x8156 USB 10/100/1G/2.5G LAN
bcdDevice 31.f4
iManufacturer 1 Realtek
iProduct 2 USB 10/100/1G/2.5G LAN
iSerial 6 xxxxxxxxx
bNumConfigurations 3
....
$ lsusb
...
Bus 002 Device 003: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
...
$ lsusb -d 0bda:8156 -v
Bus 002 Device 003: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 0 [unknown]
bDeviceSubClass 0 [unknown]
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x8156 USB 10/100/1G/2.5G LAN
bcdDevice 31.f4
iManufacturer 1 Realtek
iProduct 2 USB 10/100/1G/2.5G LAN
iSerial 6 xxxxxxxxx
bNumConfigurations 3
....
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$ lsusb -t -v
....
/: Bus 002.Port001: Dev 001, Class=root_hub, Driver=xhci_hcd/6p, 5000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
|__ Port 002: Dev 003, If0, Class=Vendor Specific Class, Driver=r8152, 5000M
ID 0bda:8156 Realtek Semiconductor Corp.
....
$ lsusb -t -v
....
/: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/6p, 5000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
|__ Port 002: Dev 003, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M
ID 0bda:8156 Realtek Semiconductor Corp.
....
$ lsusb -t -v
....
/: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/6p, 5000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
|__ Port 002: Dev 003, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M
ID 0bda:8156 Realtek Semiconductor Corp.
....
次に,USB-C to RJ45 の方は,
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$ lsusb
....
Bus 004 Device 002: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
....
$ lsusb -d 0bda:8156 -v
Bus 004 Device 002: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 0[unknown]
bDeviceSubClass 0[unknown]
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x8156 USB 10/100/1G/2.5G LAN
bcdDevice 31.04
iManufacturer 1 Realtek
iProduct 2 USB 10/100/1G/2.5G LAN
iSerial 6 xxxxxxxx
bNumConfigurations 3
.....
$ lsusb
....
Bus 004 Device 002: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
....
$ lsusb -d 0bda:8156 -v
Bus 004 Device 002: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 0 [unknown]
bDeviceSubClass 0 [unknown]
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x8156 USB 10/100/1G/2.5G LAN
bcdDevice 31.04
iManufacturer 1 Realtek
iProduct 2 USB 10/100/1G/2.5G LAN
iSerial 6 xxxxxxxx
bNumConfigurations 3
.....
$ lsusb
....
Bus 004 Device 002: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
....
$ lsusb -d 0bda:8156 -v
Bus 004 Device 002: ID 0bda:8156 Realtek Semiconductor Corp. USB 10/100/1G/2.5G LAN
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 0 [unknown]
bDeviceSubClass 0 [unknown]
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x8156 USB 10/100/1G/2.5G LAN
bcdDevice 31.04
iManufacturer 1 Realtek
iProduct 2 USB 10/100/1G/2.5G LAN
iSerial 6 xxxxxxxx
bNumConfigurations 3
.....
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$ lsusb -t -v
....
/: Bus 004.Port001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 10000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
|__ Port 002: Dev 002, If0, Class=Vendor Specific Class, Driver=r8152, 5000M
ID 0bda:8156 Realtek Semiconductor Corp.
....
$ lsusb -t -v
....
/: Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 10000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
|__ Port 002: Dev 002, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M
ID 0bda:8156 Realtek Semiconductor Corp.
....
$ lsusb -t -v
....
/: Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/2p, 10000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
|__ Port 002: Dev 002, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M
ID 0bda:8156 Realtek Semiconductor Corp.
....