Note: I just tried with the touchpad on the laptop as well, with the same result.
The touchpad lets me simulate the mouse wheel by moving my finger up and down along the right-hand edge. I tried it out in a browser to ensure it's working correctly in general, then tried it in the Network View. A graphic is overlaid (by the operating system or mouse driver, not sure) indicating that scroll wheel mode is active, but no scrolling happens.