What percent of traffic on an interface is used by printing?

What percent of traffic on an interface is used by printing?

I am pretty new to this, what is the easiest way to find out what percentage of traffic on an interface is likely being used by printing? I see several established ports are labeled as having something to do with printing, but I am under the impression that 9100 is also used and I do not see that listed. Would I create my own application for this? Perhaps some other user has made an application group of printer/print server ports that I can copy. Thanks! -Debbi

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