Zoom Bandwidth requirements and participant bandwidth limits

Zoom Bandwidth requirements

The bandwidth used by Zoom is optimized for the best experience based on the participant’s network. Bandwidth is automatically adjusted for 3G, WiFi, or wired environments.

Recommended Bandwidth for Zoom Meeting and Webinar Panelists:

  • For one-to-one video calls:
    600 kbps for high quality video (up / down)
    1.2 Mbps for 720p HD video (up / down)
    1.8 Mbps for sending and receiving 1080p HD video (up / down) )
  • For group video calls:
    800kbps / 1.2Mbps (up / down) for high quality video
    Gallery view / 720p HD video: 1.5Mbps / 1.5Mbps (up / down) 2.5Mbps for
    1080p HD video reception Up / Down)
    3.0Mbps (Up / Down) for 1080p HD video transmission
  • For screen sharing only (no video thumbnails):
  • For screen sharing with video thumbnails:
  • For Audio VoiP:

Recommended Bandwidth for Zoom Webinar Participants:

  • For one-on-one video calls:
    600 kbps (downlink) for high-quality video,
    1.2 Mbps (downlink) for HD video
  • For screen sharing only (no video thumbnails):
    50-75kbps (downlink)
  • For screen sharing with video thumbnails:
    50-150kbps (downlink)
  • For audio VoiP:
    60-80kbps (downlink)


Is it possible to limit the bandwidth of  Zoom meeting participants?

It is not possible to limit the bandwidth of the participants.

Bandwidth cannot be limited, but here are some related settings as a knack for a more comfortable meeting.

Turn off group HD video

When the Group HD video setting is ON, the video quality will be 720p and bandwidth will be consumed.


  • If you want to turn off Group HD Video for the entire organization, it is recommended that the
    account owner or administrator turns off [Group HD Video] at Zoom Sign-in> Account Settings> Meeting.

In the case of the above picture, it is locked by the administrator so that the group HD video cannot be turned on for the entire organization.


Related article

Please tell me the required network bandwidth
Group HD
Can I use Zoom in my web browser?
About the functional difference between the free version and the paid version
If a participant’s video screen goes blackout during a meeting


Will I be notified in advance if I perform regular maintenance in zoom?

It will be posted on the following site.
By registering on the above site, you can receive notification emails regarding failures, recovery, etc.


Will the data during the meeting be encrypted in zoom?

Encrypts the communication path with TLS (256 bits). Also, by enabling End to End Encryption, the data flowing in the route is also encrypted with AES (256 bits).


Is there a statement about anti-malware in zoom?

It is published on the following site.
[Security White Paper]
[PDF document (link from the above site)]
https://d24cgw3uvb9a9h.cloudfront.net /static/47884/doc/Zoom-Security-White-Paper.pdf


Does the data stored in the cloud contain personal information in zoom?

The e-mail address required for the user license contract and the name information set by the user are saved in the data center.


Is there any information sent to Siri in zoom?

No information will be sent.
Siri cannot access the private data of the Zoom app.



When using Zoom, are there any TCP / IP communication ports that need to be opened?

TCP: 80 and 443 ports must be opened. Also, although not required, we recommend opening the following ports. ・ TCP: 8801, 8802 ・ UDP: 3478, 3479, 8801-8810



How to check security certification status of Zoom

Zoom has acquired the information security certification “TRUSTe”.
In addition, Zoom’s security statement is published below.


Know it :-

I’m worried about security via the Internet. Are there any security measures for communication in zoom?

As a countermeasure against information leakage due to interception of communication on the Internet, network path encryption using TLS (256 bits), which is also used in Internet banking, is performed. Furthermore, by enabling end-to-end (between terminals) content encryption (AES256 bits), communication that cannot be decrypted is possible even on the service provider side, and confidentiality of meeting contents and chats etc. is made possible. Secure.