I think if your computer is plugged into the network, that should be sufficient, since the software will ALL be installed on the computer anyhow.
Did you have a look at these options for suitability:
There is also this earlier discussion which may give you some insights regarding Canon printers in general:
If your actual printer did have ONLY a network plug and no USB, then this other discussion might be relevant and offer some insights:
Hope those help. 
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