Enterprise Routing and Switching, Specialist (JNCIS-ENT)

Here you have the best Juniper JN0-351 practice exam questions

You have 107 total questions to study from
Each page has 5 questions, making a total of 22 pages
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This questions were last updated on October 19, 2025
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Question 1 of 107

Referring to the exhibit, which router will become the OSPF BDR if all routers are powered on at the same time?

Correct Answer: C

In OSPF, the election of the Backup Designated Router (BDR) is determined by priority first, and in case of a tie, the Router ID (RID). R1 is excluded from becoming either the DR or BDR since its priority is set to 0. This leaves R2, R3, and R4 in consideration. R2 has a priority of 100, which is lower than the priority of R3 and R4 (both 128). Between R3 and R4, both having the same highest priority, the router with the highest RID will become the Designated Router (DR). R4 has a higher RID (10.10.10.4) than R3 (10.10.10.3), so R4 becomes the DR and R3 becomes the BDR.

Question 2 of 107

What is the management IP address of the device shown in the exhibit?

10.210.20.233

172.23.12.100

128.0.0.1

172.23.11.10

Correct Answer: A

The management IP address of the device is typically found on the management interface. In the exhibit, the interface labeled 'me0' is assigned the IP address 10.210.20.233/29. This indicates that 10.210.20.233 is the management IP address.

Question 3 of 107

Which three protocols support BFD? (Choose three.)

RSTP

BGP

OSPF

LACP

FTP

Correct Answer: B, C

BFD (Bidirectional Forwarding Detection) is typically used with routing protocols to ensure rapid detection of faults. Among the given options, BGP and OSPF are known to support BFD for expedited fault detection. RSTP (Rapid Spanning Tree Protocol), LACP (Link Aggregation Control Protocol), and FTP (File Transfer Protocol) do not support BFD.

Question 4 of 107

Which statement is correct about graceful Routing Engine switchover (GRES)?

The PFE restarts and the kernel and interface information is lost.

GRES has a helper mode and are starting mode.

When combined with NSR, routing is preserved and the new master RE does not restart rpd.

With no other high availability features enabled, routing is preserved and the new master RE does not restart rpd.

Correct Answer: C

When combined with Nonstop Routing (NSR), graceful Routing Engine switchover (GRES) ensures that routing information is preserved and the new master Routing Engine does not need to restart the Routing Protocol Daemon (rpd). This allows for minimal disruption in network operations during a switch.

Question 5 of 107

Which statement is correct about controlling the routes installed by a RIB group?

An import policy is applied to the RIB group.

Only routes in the last table are installed

A firewall filter must be configured to install routes in the RIB groups.

An export policy is applied to the RIB group.

Correct Answer: A

An import policy is essential for controlling which routes get accepted into a RIB group. This policy filters the routes from various sources like other routing protocols or static routes, ensuring only the desired routes are installed.