Networkers, what does the SA and DA stand for in this line "Teredo IPv6 over UDP Tunneling SA=[] DA=[]?

I am a beginning Networking student and am studying for a test. I have google searched this with no luck. The question is, what does the SA and DA stand for in this line "Teredo IPv6 over UDP Tunneling SA=[] DA=[]"? I know Teredo is IPv6 to IPv4, just don't know what SA and DA are. Are they Server address and Destination address? Thnx for any help.