JN0-102 · Question #40
Which statement is correct regarding the Junos OS?
The correct answer is B. The Junos OS provides separation between the control and forwarding planes. A fundamental design principle of Junos OS is the clear separation between its control and forwarding planes, ensuring robust and high-performance operation.
Question
Which statement is correct regarding the Junos OS?
Options
- AThe same Junos OS image is used on all Junos devices.
- BThe Junos OS provides separation between the control and forwarding planes.
- CEach Junos OS image is based on model-specific source code.
- DThe Junos OS creates a secondary instance of the kernel to ensure redundancy.
How the community answered
(26 responses)- B92% (24)
- C4% (1)
- D4% (1)
Why each option
A fundamental design principle of Junos OS is the clear separation between its control and forwarding planes, ensuring robust and high-performance operation.
While Junos OS shares a common codebase, there are different images or packages tailored for various platforms (e.g., MX, EX, SRX) due to different hardware and feature sets.
A core tenet of Junos OS architecture is the explicit separation of the Routing Engine (control plane) and the Packet Forwarding Engine (forwarding plane) to ensure robustness and performance.
Junos OS is based on a single, unified source code, which is then compiled and packaged for different hardware platforms, rather than having model-specific source code.
While Junos OS supports redundancy (e.g., redundant REs), it does not typically create a secondary instance of the kernel within a single RE for redundancy in this manner.
Concept tested: Junos OS architecture - control and forwarding plane separation
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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