Use the command sudo apt-get install zd1211-firmware to install the necessary firmware blobs.

The "CT-WN4320Z" label is often a rebranded model name used by manufacturers like (frequently bundled with older Telus or Verizon equipment). To find the correct driver, you need to know the "brain" inside:

If you still can't find the driver, check the Microsoft Update Catalog and search for the Hardware ID (found in Device Manager under Properties > Details > Hardware Ids).

[Insert Download Link]

Understanding the hardware is the first step to finding the correct driver: USB 2.0 (High Speed). Standards: IEEE 802.11b/g.

Driver Wlan Usb 2.0 Ct-wn4320z