Samsung UN65D8000XFXZA - Manual (Page 88)

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Automatic Network Setup
Most wireless networks have an optional security system that requires devices that
access the network to transmit an encrypted security code called an Access or
Security Key. The Security Key is based on a Pass Phrase, typically a word or a
series of letters and numbers of a specified length you were asked to enter when
you set up security for your wireless network. If you use this method of setting
up the network connection, and have a Security Key for your wireless network,
you will have to enter the Pass Phrase during the the automatic or manual setup
process.