20+ practice questions focused on Routing Fundamentals — one of the most tested topics on the Juniper Networks Certified Associate Junos JNCIA-Junos exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Routing Fundamentals PracticeA 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?
Explanation: The 'show route' command displays the active routing table entries, including directly connected, static, and dynamic routes learned via protocols like OSPF, BGP, or IS-IS. This is the correct command to view the active routes the device uses for forwarding traffic.
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?
Explanation: Option C is correct because configuring two static default routes with equal metric values and enabling Equal-Cost Multi-Path (ECMP) allows the Juniper device to load-balance outbound traffic equally across both ISP links. ECMP uses per-flow or per-packet load balancing based on the hash of source/destination IP addresses and ports, ensuring traffic is distributed evenly without relying on dynamic routing protocols.
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?
Explanation: In Junos, the route with the lowest preference value is installed in the forwarding table. Static routes have a default preference of 5, while OSPF internal routes have a default preference of 10. Therefore, the static route is preferred and installed.
Which TWO statements about active routes in the Junos routing table are correct?
Explanation: Option C is correct because an active route in Junos is one that is selected as the best route for a given prefix and is installed in the forwarding table (the FIB). The forwarding table is used by the Packet Forwarding Engine (PFE) to make actual forwarding decisions, so only active routes are placed there.
Which THREE statements about static routes in Junos are correct?
Explanation: Static routes in Junos have a default preference of 5, which is lower (more preferred) than routes learned from most dynamic routing protocols like OSPF (preference 10) or IS-IS (preference 18). This default value ensures that static routes are preferred over dynamically learned routes unless explicitly overridden.
+15 more Routing Fundamentals questions available
Practice all Routing Fundamentals questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Routing Fundamentals. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Routing Fundamentals questions on the JNCIA-JUNOS frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Routing Fundamentals is tested as part of the Juniper Networks Certified Associate Junos JNCIA-Junos blueprint. Practicing with targeted Routing Fundamentals questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Routing Fundamentals is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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