Network and bandwidth requirements

Network requirements for the Cornerstone Classroom App and Express clients

The standard requested ports for Cornerstone Classroom to establish connectivity with the servers are as follows:

Table 1. Supported ports
Client Port Type Port Number
App TCP 443
Express UDP/TCP 3478/3479

For whitelisting of Cornerstone Classroom server IP addresses and ports for your environment, submit a request. For more details, contact Support.

Bandwidth requirements for the Cornerstone Classroom App client

The following table shows the bandwidth usage per client for several scenarios. Bandwidth requirements for a single location will be multiples of the number of clients attending the session from that location. These are estimated figures that can be used to approximate the load on a network bandwidth when running a Cornerstone Classroom session with audio, video, screen sharing, and uploaded file content.

Table 2. Bandwidth Usage Calculation
Configuration Bandwidth (Kbps/client)

Standard Video

  • One 360p primary video
  • One audio
330

Standard Video

  • One 360p primary video
  • Two 90p secondary videos
  • One audio
498

Premium Video

  • One 720p video
  • One audio
1760

Premium Video

  • 25 180p videos
  • One audio
2385

Premium Video

  • One 720p primary video
  • Two 180p secondary videos
  • One audio
  • Whiteboard/Content
1096

Application/Desktop Share

(Standard or Premium Video)
  • 1920x1200 screen share
  • One audio
485