If you gave me the correct model, the wifi is already built in, no dongle is required.
If it is an older model it may need one.
The model you mentioned can use either wired or wifi.
However there is a bigger issue that being an older model, most of the apps on it aren't even supported at this point. Netflix may work, but things like youtube, pandora, and amazon will not because the player is no longer being updated and has old software.
Other than replacing it with a new player, what I would recommend is keeping it as-is for playing discs, and then connecting your tv to a separate external streaming device. For $40 or so you can buy a roku or fire tv and get all the same functions and many more, with better performance and support and lower cost.
If you have any other questions, just let me know. Otherwise, please take a moment to rate my service as this is the only way I am credited for my time. Hopefully I have earned 5 Stars but if not please let me know what I can do to ensure you are satisfied. I also invite you to contact me directly with any future support needs at http://bit.ly/1QwLxGh and ask for Nathan.
Thank you, ***** ***** a nice day,