SUSE Enterprise Licensing Question

I have a couple of questions about licensing:

1.If I purchase a 1-year support license/agreement of SUSE Enterprise
after the year I have to purchase another support license/agreement in
order to remain using it legally right?
2. Do the software stop working (expire) if I don’t purchase a new
support agreement?
3.A support agreement should be bought for each server on my company
or 1 agreement apply to all my servers?

Thanks in advance!
SUSE ROCKS!!!!!!!!!!!!!!!!!!
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