Public Wi-Fi poses real security risks including man-in-the-middle attacks, fake hotspots, session hijacking, malware injection, and packet sniffing. Red flags for unsafe networks include no password requirement, suspicious generic passwords, and unexpected pop-ups. Key protective measures include using a VPN, sticking to HTTPS sites, disabling file sharing, avoiding sensitive account access, keeping antivirus updated, and turning off auto-connect for Wi-Fi networks.
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