A Junos router has a routing table with multiple protocols contributing routes. The network team wants to understand how the forwarding table is populated. Which statement accurately describes the relationship between the routing table and the forwarding table?

The forwarding table is a copy of the routing table, including all routes from all protocols.

The kernel selects the best routes from the routing table and installs them into the forwarding table.

The PFE builds the forwarding table directly from routing protocol updates.

The forwarding table is built by the mgd process from the configuration.

How does the Packet Forwarding Engine (PFE) interact with the Routing Engine (RE) in Junos?

The PFE sends all packets to the RE for forwarding decisions

The PFE runs routing protocols and shares routes with the RE

The RE and PFE share a single CPU

The RE installs the forwarding table into the PFE

A service provider is implementing nonstop routing (NSR) on a pair of Junos routers to minimize downtime during a Routing Engine switchover. What is the primary benefit of NSR over graceful restart?

NSR allows the router to continue forwarding packets even if both Routing Engines fail.

NSR does not require neighboring routers to support any special capabilities.

NSR eliminates the need for a standby Routing Engine.

NSR reduces the time needed to rebuild the forwarding table after a switchover.

Which management function is performed by the control plane in Junos?

Applying QoS classifiers to packets

Switching packets between interfaces

A Junos router is forwarding traffic at high rates. The network team wants to understand how the PFE makes forwarding decisions. Which statement best describes the PFE's role?

The PFE uses the forwarding table to determine the next hop for each packet.

The PFE consults the Routing Engine for each packet's next hop.

The PFE is responsible for management functions like SSH.

The PFE runs routing protocols to build the forwarding table.

Juniper NetworksCertified Associate, Junos

Domain 2Objective 2

Control and Forwarding Planes JN0-105 Practice Questions (Page 4)

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 33 practice questions to prepare you well beyond it. (estimate)

33questions here

7free pages

10concepts

Questions 16–20

16application · medium
A Junos router has a routing table with multiple protocols contributing routes. The network team wants to understand how the forwarding table is populated. Which statement accurately describes the relationship between the routing table and the forwarding table?
Select an answer first
17foundation · easy
How does the Packet Forwarding Engine (PFE) interact with the Routing Engine (RE) in Junos?
Select an answer first
18application · medium
A service provider is implementing nonstop routing (NSR) on a pair of Junos routers to minimize downtime during a Routing Engine switchover. What is the primary benefit of NSR over graceful restart?
Select an answer first
19foundation · easy
Which management function is performed by the control plane in Junos?
Select an answer first
20application · easy
A Junos router is forwarding traffic at high rates. The network team wants to understand how the PFE makes forwarding decisions. Which statement best describes the PFE's role?
Select an answer first

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