Which task is performed by the Routing Engine in a Junos device?

Rewriting the MAC address of packets being forwarded

Applying firewall filters to packets as they arrive on an interface

Forwarding individual data packets based on the forwarding table

Managing the device through SSH and SNMP

A network administrator is troubleshooting high latency on a Junos router. The administrator suspects that the Packet Forwarding Engine is overloaded. Which action would help alleviate the load on the PFE?

Enable hardware-based forwarding optimizations, such as fast reroute.

Increase the number of routes in the routing table.

Move all traffic to the Routing Engine for processing.

Disable the Packet Forwarding Engine's hardware acceleration.

A network engineer is explaining Junos architecture to a colleague. Which statement accurately describes the role of the Packet Forwarding Engine?

It stores the configuration and logs for the router.

It forwards packets using hardware-based processing and maintains the forwarding table.

It runs routing protocols and builds the routing table.

It provides the management interface for configuring the router.

A network administrator is planning to upgrade the Routing Engine on a Junos router. The router is carrying live traffic. The administrator wants to minimize downtime. Which approach is most appropriate?

Disable the PFE before replacing the Routing Engine to prevent packet loss.

Replace the Routing Engine while the router is running, as the PFE will continue forwarding traffic using its current forwarding table.

Reboot the router first, then replace the Routing Engine, to ensure the PFE has the latest forwarding table.

Perform the upgrade during a maintenance window, as the router will be down during the RE replacement.

What is the primary role of the Packet Forwarding Engine in Junos?

Running routing protocols and updating the routing table

Storing the configuration and providing the CLI

Forwarding packets at high speed using hardware-based processing

Encrypting all traffic passing through the device

Juniper NetworksCertified Associate, Junos

Domain 2Objective 3

Routing Engine and Packet Forwarding Engine JN0-105 Practice Questions (Page 3)

Part of the Junos OS Fundamentals domain, which makes up ~14% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–8 in this domain), expect 1–2 from this objective — we provide 18 practice questions to prepare you well beyond it. (estimate)

18questions here

4free pages

4concepts

Questions 11–15

11foundation · easy
Which task is performed by the Routing Engine in a Junos device?
Select an answer first
12expert · medium
A network administrator is troubleshooting high latency on a Junos router. The administrator suspects that the Packet Forwarding Engine is overloaded. Which action would help alleviate the load on the PFE?
Select an answer first
13application · easy
A network engineer is explaining Junos architecture to a colleague. Which statement accurately describes the role of the Packet Forwarding Engine?
Select an answer first
14expert · medium
A network administrator is planning to upgrade the Routing Engine on a Junos router. The router is carrying live traffic. The administrator wants to minimize downtime. Which approach is most appropriate?
Select an answer first
15foundation · easy
What is the primary role of the Packet Forwarding Engine in Junos?
Select an answer first

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