Evaluating The Impact Of Screen Share On Your Network Data Usage - Smart Technologies SMART kapp iQ Pro 55 Administrator's Manual

CHAPTER 4
SETTING UP THE INTERACTIVE FLAT PANEL
Protocol
TCP
UDP
TCP
TCP
TCP
UDP
TCP
TCP
UDP
UDP
TCP
TCP
TCP
UDP
TCP
TCP
UDP
UDP

Evaluating the impact of Screen Share on your network data usage

When you connect your device or computer to the board using Screen Share, the screen sharing
protocol compresses the image from your device or computer. The protocol may transmit only
areas of the screen that change. This can make it difficult to estimate the impact of Screen Share
on a network where many users would like to screen share simultaneously.
For example, in a school where 30 teachers are using Screen Share simultaneously, 10% of
teachers might be streaming video while 90% might be sharing static content with periodic
updates. The network could expect to see an additional 5 MB/sec in network traffic. Use the table
below to help estimate the impact of Wireless Screen share on your network.
Content being shared
Static content, minor screen movement
Static content, periodic scrolling or refresh
27 smarttech.com/kb/171000
Port Range
80
123
3689
5000
5353
5353
7000
7001
7010
7011
7100
47000
49152–65535
49152–65535
49228
50259
54780
62572
Data rate transmission
20 kb/sec
Spikes briefly to 500–600 kb/sec, returns to 20
kb/sec
Feature
Outbound http
Network Time Protocol
iTunes music sharing
Audio streaming
mDNS
mDNS
Picture sharing
Video streaming
Display mirroring
Display mirroring
Display mirroring
Audio negotiation
Dynamic ports
Dynamic ports
Google Cast
Google Cast
Google Cast
Google Cast