addnode vs seednode

addnode vs seednode

Could someone please elaborate on the difference between the addnode and seednode settings in the bitcoind configuration file.

-addnode=<ip>   Add a node to connect to and attempt to keep the connection open 

-seednode=<ip>  Connect to a node to retrieve peer addresses, and disconnect

In which situation should I be using either of them? And would either of them be preferable for a node configured to run through Tor with dns=0 and dnsseed=0 set? Should one perhaps be using both of them?

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