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FTP Active vs Passive Mode

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Pro scenario

FTP Active vs Passive Mode is part of the Pro tier — advanced networking topics including BGP routing, Zero Trust, DDoS attacks, QUIC, TLS certificate chains, and more.

This scenario covers

Why FTP uses two TCP connections (control and data), the fundamental difference between active and passive mode, and why passive mode is required when clients are behind NAT/firewalls.

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