A network engineer is configuring a new Juniper router for OSPF. The router has the following interfaces: lo0.0 = 10.0.0.1/32, lo1.0 = 10.0.0.2/32, and ge-0/0/0.0 = 192.168.1.1/30. No manual router ID is configured. What will be the OSPF router ID?

The router ID will be randomly assigned

A network engineer is troubleshooting an OSPF issue where two routers have the same router ID. What is the most likely impact of this misconfiguration?

The routers will form adjacencies but will have incorrect metrics

The routers will still form adjacencies but will not exchange routes

OSPF adjacencies will not form or will flap between the two routers

The routers will form adjacencies but will not elect a DR

What is the correct order of preference for OSPF router ID selection on a Juniper device?

Highest loopback IP, manually configured router ID, highest active interface IP

Manually configured router ID, highest loopback IP, highest active interface IP

Highest active interface IP, highest loopback IP, manually configured router ID

Lowest loopback IP, highest active interface IP, manually configured router ID

Why is a stable OSPF router ID important?

It ensures the router ID is the same as the BGP router ID

It increases the OSPF metric calculation speed

It allows the router to be identified by its hostname in OSPF packets

It prevents unnecessary OSPF adjacency resets and link-state database churn

A network engineer is configuring a new Juniper router that will be used as an OSPF area border router (ABR). The router has multiple loopback interfaces and physical interfaces. The engineer wants to ensure the router ID is stable and does not change if a loopback interface is added or removed. What should the engineer do?

Use the same IP address on all loopback interfaces

Configure a manual router ID under the OSPF protocol

Ensure the highest loopback IP is always used

Disable OSPF on all physical interfaces

Juniper NetworksCertified Specialist, Service Provider Routing and Switching (JNCIS-SP)

Domain 2Objective 3

Router ID JN0-364 Practice Questions (Page 2)

Part of the Open Shortest Path First (OSPF) domain, which makes up ~15% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–9 in this domain), expect 1–1 from this objective — we provide 14 practice questions to prepare you well beyond it. (estimate)

14questions here

3free pages

4concepts

Questions 6–10

6application · easy
A network engineer is configuring a new Juniper router for OSPF. The router has the following interfaces: lo0.0 = 10.0.0.1/32, lo1.0 = 10.0.0.2/32, and ge-0/0/0.0 = 192.168.1.1/30. No manual router ID is configured. What will be the OSPF router ID?
Select an answer first
7expert · hard
A network engineer is troubleshooting an OSPF issue where two routers have the same router ID. What is the most likely impact of this misconfiguration?
Select an answer first
8foundation · easy
What is the correct order of preference for OSPF router ID selection on a Juniper device?
Select an answer first
9foundation · easy
Why is a stable OSPF router ID important?
Select an answer first
10application · medium
A network engineer is configuring a new Juniper router that will be used as an OSPF area border router (ABR). The router has multiple loopback interfaces and physical interfaces. The engineer wants to ensure the router ID is stable and does not change if a loopback interface is added or removed. What should the engineer do?
Select an answer first

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