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Routing Fundamentals practice questions

Practise Juniper Networks Certified Associate Junos JNCIA-Junos Routing Fundamentals practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security
20 questionsDomain: Routing Fundamentals
Practice 10 questionsBrowse domain →

What the exam tests

What to know about Routing Fundamentals

Routing questions usually test route selection (administrative distance, metric), how static routes are configured and when they are preferred over dynamic routing.

Administrative distance comparing routing sources.

Static route configuration: next-hop vs exit interface.

Default route propagation and the gateway of last resort.

Recursive routing table lookups.

Watch out for

Common Routing Fundamentals exam traps

  • ▸Lower administrative distance wins when two routing sources have the same prefix.
  • ▸A static route with an exit interface creates a directly-connected dependency.
  • ▸The gateway of last resort is set by the default route, not automatically.
  • ▸Metric is only compared within the same routing protocol.

Practice set

Routing Fundamentals questions

20 questions · select your answer, then reveal the explanation

Question 1easymultiple choice
Review the full routing breakdown →

A network engineer is troubleshooting a connectivity issue and wants to see the active routes in the routing table. Which Junos CLI command should they use?

Question 2mediummultiple choice
Review the full routing breakdown →

An organization has two ISPs and wants to load-balance traffic equally across both links for all outbound traffic. Which routing configuration approach should be used?

Question 3hardmultiple choice
Review the full OSPF breakdown →

During a routing table lookup, a packet matches both a static route and an OSPF route to the same destination. Which route will be installed in the forwarding table?

Question 4easymulti select
Review the full routing breakdown →

Which TWO statements about active routes in the Junos routing table are correct?

Question 5mediummulti select
Review the full routing breakdown →

Which THREE statements about static routes in Junos are correct?

Question 6hardmulti select
Review the full routing breakdown →

Which THREE route types are considered protocol-independent in Junos?

Question 7mediummultiple choice
Review the full routing breakdown →

Refer to the exhibit. How many static default routes are configured?

Exhibit

show route protocol static

inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[Static/5] 00:10:00, metric2 0
                    > to 10.0.0.1 via ge-0/0/0.0
                    [Static/10] 00:05:00, metric2 0
                      to 10.0.0.2 via ge-0/0/1.0
Question 8hardmultiple choice
Review the full routing breakdown →

Refer to the exhibit. Which route is active for the 192.168.1.0/24 prefix?

Exhibit

show route 192.168.1.0/24

inet.0: 15 destinations, 15 routes (15 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.1.0/24     *[OSPF/10] 01:00:00, metric 20
                    > to 10.0.0.2 via ge-0/0/0.0
                    [Static/5] 00:30:00, metric 0
                      to 10.0.0.3 via ge-0/0/1.0
Question 9hardmultiple choice
Review the full routing breakdown →

You are the network engineer for a mid-sized enterprise with a Juniper MX router running Junos. The router has two uplinks to the internet: one to ISP-A via ge-0/0/0 (10.0.0.1/30) and one to ISP-B via ge-0/0/1 (10.0.0.5/30). You have configured static default routes to both ISPs: one to 10.0.0.2 and one to 10.0.0.6. Both routes have the same preference (default 5) and metric. You enabled ECMP to load-balance outbound traffic. After testing, you notice that all traffic is being sent only to ISP-A, and none to ISP-B. You verify that both interfaces are up and that the next-hop addresses are reachable. You check the routing table and see both routes are active but with different next-hop counts. What is the most likely cause of the traffic not being load-balanced?

Question 10mediummultiple choice
Review the full OSPF breakdown →

Your Juniper router is running OSPF with multiple neighbors. You have a prefix 10.10.10.0/24 that is being learned via OSPF from two different routers: Router A with metric 30 and Router B with metric 20. The OSPF route from Router B is active. You want to ensure that traffic to 10.10.10.0/24 uses the path through Router A instead, even though it has a higher metric. You cannot change the OSPF metric on Router A. Which action should you take?

Question 11mediummultiple choice
Read the full NAT/PAT explanation →

A router has two routes to the same destination: one with preference 10 and metric 5, and another with preference 15 and metric 3. Which route will be installed in the forwarding table?

Question 12easymultiple choice
Review the full routing breakdown →

Which Junos command displays the route to a specific IP address, including the active route and any backup routes?

Question 13hardmultiple choice
Review the full routing breakdown →

A network administrator wants to filter routes from being installed in the routing table based on certain criteria. Which Junos feature should be used?

Question 14mediummulti select
Read the full NAT/PAT explanation →

Which TWO attributes are used by Junos to select the active route among multiple routes to the same destination?

Question 15easymultiple choice
Review the full routing breakdown →

What is the default preference of a direct route in Junos?

Question 16mediummultiple choice
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A network engineer is troubleshooting a reachability issue between two directly connected routers. Both routers have IP addresses configured on their interfaces and the interfaces are up. Which command would the engineer use to verify the routing table entry for the remote network?

Question 17mediummulti select
Review the full routing breakdown →

Which THREE statements are true regarding static routes in Junos?

Question 18hardmultiple choice
Review the full routing breakdown →

Refer to the exhibit. The router has three static routes configured. Which route will be used to forward a packet destined to 172.16.1.100?

Exhibit

Refer to the exhibit.
```
user@router> show route protocol static

inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[Static/5] 00:10:00, metric2 0
                    > to 192.168.1.1 via ge-0/0/0.0
10.0.0.0/8         *[Static/5] 00:05:00, metric2 0
                    > to 10.0.0.1 via ge-0/0/1.0
172.16.0.0/16      *[Static/5] 00:02:00, metric2 0
                    > to 172.16.0.1 via ge-0/0/2.0
```
Question 19easymultiple choice
Review the full subnetting walkthrough →

You are managing a small enterprise network with one Juniper router and two switches. The router connects to an ISP via ge-0/0/0 and to the internal network via ge-0/0/1. The internal network uses the 192.168.1.0/24 subnet. You need to configure a default route on the router to send all Internet-bound traffic to the ISP gateway at 203.0.113.1. You also want to ensure that internal hosts can reach the Internet. After configuring the default route, you test connectivity from a host on the internal network to an external website, but the ping fails. You verify that the host has an IP address of 192.168.1.100/24 and a default gateway of 192.168.1.1 (the router's internal interface). On the router, you run 'show route 0.0.0.0/0' and see the default route active. You also run 'ping 203.0.113.1' from the router and it succeeds. However, pinging from the host to the ISP gateway fails. What is the most likely cause?

Question 20easymulti select
Review the full routing breakdown →

Which TWO statements are true about static routes in Junos?

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Frequently asked questions

What does the JNCIA-JUNOS exam test about Routing Fundamentals?
Routing questions usually test route selection (administrative distance, metric), how static routes are configured and when they are preferred over dynamic routing.
How should I use these practice questions?
Select your answer before revealing the explanation. Then read why each option is right or wrong — this active recall approach builds retention far faster than re-reading notes.
Can I practise just Routing Fundamentals questions in a focused session?
Yes — the session launcher on this page draws every question from the Routing Fundamentals domain. Use a 10-question session first to gauge your baseline, then move to 20 or 30 once the weak spots are clear.
Where can I practise other JNCIA-JUNOS topics?
Use the topic links above to move to related areas, or go back to the JNCIA-JUNOS question bank to see all topics.
Are these real exam questions or dumps?
These are original practice questions written to test the same concepts the JNCIA-JUNOS exam covers. They are not copied from any real exam or dump site.