QUESTION: 41

Referring to the exhibit, which two statements are correct? (Choose two.)

The memory utilization is 28%.
The memory utilization is 72%.
The 15 minute CPU load average is 99%.
The CPU kernel utilization is 1%.

Answer(s): A,D

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QUESTION: 42

Which two statements describe the connection between the control plane and the forwarding plane? (Choose two.)

Exception traffic is preferred over control traffic during congestion.
A rate limiter is configured by default.
Control traffic is preferred over exception traffic during congestion.
No rate limiter is configured by default.

Answer(s): B,C

Explanation:

The Junos OS rate limits exception traffic traversing the internal link to protect the RE from denial-of-service (DoS) attacks. During times of congestion, the Junos OS gives preference to the local and control traffic destined for the RE. The built-in rate limiter is not configurable.

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QUESTION: 43

When a system process encounters an error, how does the Junos OS protect other processes from being impacted?

Each process operates in its own shared memory space.
The Junos OS executes only one process at a time.
Each routing protocol runs as an individual process.
The Junos OS executes multiple processes simultaneously.

Answer(s): A

Explanation:

unos OS functionality is compartmentalized into multiple software processes. Each process handles a portion of the device’s functionality. Each process runs in its own protected memory space, ensuring that one process cannot directly interfere with another. When a single process fails, the entire system does not necessarily fail. This modularity also ensures that new features can be added with less likelihood of breaking current functionality. The Junos OS is the trusted, secure network operating system powering the high-performance network infrastructure offered by Juniper Networks. The Junos kernel is based on the FreeBSD UNIX operating system, which is an open-source software system.
http://juniper-basic.blogspot.com/2017/02/juniper-basic.html

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