PSK (Pre-Shared Key) is a passphrase used for authenticating connections to a wireless access point under WPA2 and similar Wi-Fi security standards. Based on this shared secret, individual encryption keys are derived for each connecting device. Because it requires no external authentication server, PSK is widely used in home and small-office wireless networks.

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• 2023r05 #65Wi-Fi のセキュリティ規格である WPA2を用いて，PC を無線 LAN ルータと接続するときに設定する PSK の説明として，適切なものはどれか。