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Juniper Exam JN0-105 Topic 4 Question 35 Discussion

Actual exam question for Juniper's JN0-105 exam
Question #: 35
Topic #: 4
[All JN0-105 Questions]

Which two statements are true about the PFE? (Choose two.)

Show Suggested Answer Hide Answer
Suggested Answer: A, B

The Packet Forwarding Engine (PFE) in Juniper Networks devices is the heart of the data plane, handling the actual forwarding of packets based on pre-computed forwarding tables. It provides several critical services to manage and control traffic flow, including policing (to enforce bandwidth limits for certain traffic types), stateless firewall filtering (to permit or deny traffic based on predefined criteria), and Class of Service (CoS) (to prioritize traffic to ensure quality of service for critical applications). The PFE utilizes both Layer 2 (MAC addresses) and Layer 3 (IP addresses) forwarding tables to make intelligent forwarding decisions, ensuring that packets are efficiently routed toward their final destination.


by Ressie at May 06, 2025, 12:31 AM

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Leanora
1 months ago
I think D is not true, as the PFE is not responsible for protocol updates.
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Crista
1 months ago
D is a bit of a stretch, the PFE is more about the hardware and data plane, not the control plane. I'd go with B and C.
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Willow
7 days ago
Definitely, the PFE uses Layer 2 and Layer 3 forwarding tables and handles chassis components.
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Willow
15 days ago
I agree, B and C are the correct statements about the PFE.
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Deeanna
22 days ago
Yeah, D is definitely not true. B and C make more sense for the PFE.
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Deeanna
26 days ago
I agree, B and C are the correct statements about the PFE.
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Peggie
1 months ago
I believe C is also true because the PFE handles chassis components.
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Lavonne
2 months ago
I agree with Emiko, the PFE does implement various services and uses forwarding tables.
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Viola
2 months ago
Haha, the PFE is like the brain and brawn of the network device, handling everything from traffic to chassis control. I'm going with B and C.
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Keneth
20 days ago
Temeka: So, B and C are the correct statements about the PFE.
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Temeka
21 days ago
User 2: Yeah, that's true. It also handles processes that control the chassis components.
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Anglea
28 days ago
User 1: I think the PFE is responsible for forwarding traffic using Layer 2 and Layer 3 tables.
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Francine
2 months ago
I think A and B are the right choices. The PFE handles packet forwarding and various services like policing and QoS.
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Eladia
11 days ago
User 4: No, that responsibility lies with other components in the system.
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Novella
16 days ago
User 3: So, the PFE doesn't handle all processes that control the chassis components?
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Reta
1 months ago
User 2: I agree, the PFE implements services like policing and uses Layer 2 and Layer 3 forwarding tables.
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Margret
2 months ago
User 1: I think A and B are correct. The PFE handles packet forwarding and various services like policing and QoS.
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Emiko
2 months ago
I think A and B are true about the PFE.
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Lajuana
3 months ago
B and C seem to be the correct answers. The PFE is responsible for forwarding and chassis control, but not protocol updates.
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Vallie
2 months ago
C) The PFE handles all processes that control the chassis components.
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Luz
2 months ago
B) The PFE uses Layer 2 and Layer 3 forwarding tables to forward traffic toward its destination.
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Huey
2 months ago
A) The PFE implements various services such as policing, stateless firewall filtering, and class of service.
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