| Hi annfi,
1. from menu bar, airport symbol, select the network or give the credentials. Depending on what has been set for which networks security, you may need password in a format, or you many need user credentials if something nicer (like radius) has been set up.
2. Ask that neighbor. Also because if you would just find out the password for it by your own that would be still using it without permission. If you are only going to be there every now and then and use it very little, most likely they will be fine with it.
(Moved to networking..)
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