To use the Samsung ViewFinity S6 S34C652VAU as a USB hub, including charging the connected notebook and the LAN connection, you need a USB-C cable with the following specifications:

- USB-C with Power Delivery (PD): The cable should support Power Delivery to charge the notebook. A minimum output of 90W is recommended, as this is the typical requirement for many notebooks.
- USB-C with data transmission and DisplayPort Alternate Mode (DP Alt Mode): This enables the transmission of image signals and data.
- USB-C with Ethernet (LAN) support: Some USB-C cables have integrated Ethernet adapters, but this is usually provided via the monitor itself if it has a USB-C port with LAN function.

A USB-C cable that fulfils all these requirements should be labelled as "USB-C 3.2 Gen 2" or higher and with "Power Delivery" and "DisplayPort Alternate Mode". Make sure the cable is from a trusted manufacturer to ensure a reliable connection.