Zoom provides bandwidth requirements for meetings at the URL below:

https://support.zoom.us/hc/en-us/articles/201362023-System-requirements-for-Windows-macOS-and-Linux

While Zoom only requires 1.5 Mbps to use, our experience suggests that speeds below 5 Mbps are not adequate for two-way interaction.  

If you need to send or upload a file or video, you’ll want good upload speed. That’s especially important if you have multiple people in the same location doing the same thing at the same time since everyone on the same home network shares internet bandwidth. Also, if you make HD videos or any other type of large file and need to upload them to IVS, Brightspace, or the cloud, your upload speed will come into play.

If your internet service does not meet these recommendations, you can still use Zoom without the video and just use the audio portion (providing your instructor approves) since audio requires far less download and upload bandwidth.  It is often a good idea to run speed test from multiple devices to get more accurate results

For more information on testing your upload and download Internet connection speeds, see Test Internet Speed and Bandwidth.