JN0-102 · Question #34
Which two design goals describe the Junos OS design? (Choose two.)
The correct answer is B. clean separation of control and forwarding planes C. modularization of multiple software processes. Junos OS is designed with a clear separation of control and forwarding planes, and it employs modularization of multiple software processes for stability and scalability.
Question
Which two design goals describe the Junos OS design? (Choose two.)
Options
- Aclean separation of security and routing policies
- Bclean separation of control and forwarding planes
- Cmodularization of multiple software processes
- Da single hardware platform for all software applications
How the community answered
(37 responses)- A3% (1)
- B92% (34)
- D5% (2)
Why each option
Junos OS is designed with a clear separation of control and forwarding planes, and it employs modularization of multiple software processes for stability and scalability.
While Junos OS integrates security and routing, 'clean separation of security and routing policies' is not considered a primary architectural design goal in the same vein as plane separation.
Junos OS explicitly separates the control plane (Routing Engine) from the forwarding plane (Packet Forwarding Engine) to ensure that control plane activities do not impact data plane performance.
The Junos OS design employs modular software processes, where different functions run as independent processes, enhancing stability and fault isolation.
Junos OS runs on various hardware platforms (routers, switches, firewalls), not a single hardware platform for all software applications.
Concept tested: Junos OS architecture and design principles
Source: https://www.juniper.net/documentation/us/en/software/junos/junos-os-fundamentals/topics/topic-map/junos-os-fundamentals-architecture.html
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