JN0-102 · Question #41
What are two functions of the RE? (Choose two).
The correct answer is A. to maintain routing tables C. to manage the PFE. The Routing Engine (RE) performs crucial control plane functions, including maintaining routing tables and managing the operations of the Packet Forwarding Engine (PFE).
Question
What are two functions of the RE? (Choose two).
Options
- Ato maintain routing tables
- Bto forward traffic toward its destination
- Cto manage the PFE
- Dto implement various services such as policing, stateless firewall filtering, and class of service
How the community answered
(15 responses)- A87% (13)
- B7% (1)
- D7% (1)
Why each option
The Routing Engine (RE) performs crucial control plane functions, including maintaining routing tables and managing the operations of the Packet Forwarding Engine (PFE).
The RE runs routing protocols, builds and maintains the routing tables, and then uses this information to construct the forwarding table for the PFE.
Forwarding traffic toward its destination is the primary function of the PFE, not the RE, which focuses on control plane tasks.
The RE acts as the brain of the device, managing and controlling all aspects of the PFE, including downloading the forwarding table and managing hardware components.
While the RE configures these services, the actual implementation and enforcement of policing, stateless firewall filtering, and class of service (CoS) are performed by the PFE.
Concept tested: Routing Engine functions
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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