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ISC2 CISSP 2024 outline · Domain 4: Communication & network security

IPv4/IPv6, secure protocols (TLS, IPsec, SSH, SNMPv3) and their uses

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Last reviewed September 30, 2026 · Leer en español

Internet Protocol (IP) addressing and the secure protocols that run over it are the plumbing behind most network design questions. You need to know how IPv4 and IPv6 differ in security-relevant ways, and which secure protocol fits which job. The exam rarely asks you to calculate subnets; it asks you to choose the right protection for a described situation and to spot an insecure legacy protocol.

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