Linksys Portforward UDP or TCP

Hi,

I want to run a small personal site off my cable connection. I have a Linksys router and I want to open port forwarding.

I want the follwoing port open:

25,53,80,110

Question is: What do I choose for UDP or TCP or BOTH? Do I really need BOTH checked? What is the difference?

Thanks

 

 

 

 

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