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ISC2 SSCP Oct 2025 outline · Domain 2: Access controls

Internetwork trust: extranets, third-party connections, zero trust

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Last reviewed September 25, 2026 · Leer en español

Organizations rarely work alone. Suppliers, customers, managed service providers, cloud vendors and partners all need some connection into your systems. Each connection extends your attack surface, and many serious breaches have started at a trusted third party. This topic covers how to connect with outside parties safely and the shift from trusting networks to verifying every request.

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