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Juniper Networks Certified Associate, Junos (JNCIA-Junos) JN0-106 · Domain 2: Junos OS fundamentals

Junos OS vs Junos OS Evolved (FreeBSD-based vs Linux-based)

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Last reviewed September 25, 2026 · Leer en español

Juniper maintains two variants of its operating system. Classic Junos OS is built on a FreeBSD kernel, a Unix-like operating system, and has been Juniper's platform for most of the company's history. Junos OS Evolved is a newer variant built on Linux, used on a subset of newer platforms. The exam expects you to know the difference in foundation and to understand that the user experience is deliberately the same.

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