Candidates for the JN0-351 exam come from every age and field, and ExamCost built for all of them. 192 practice questions written to be understood easily, in three formats you can choose between according to your own taste.
Juniper JN0-351 Exam Overview:
| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Enterprise Routing and Switching, Specialist (JNCIS-ENT) |
| Exam Number: | JN0-351 |
| Exam Price: | $300 USD |
| Related Certifications: | JNCIS-ENT |
| Available Languages: | English |
| Exam Format: | Multiple-choice questions |
| Certificate Validity Period: | 3 years |
| Passing Score: | Not specified (Pass/Fail status available immediately) |
| Real Exam Qty: | 65 |
| Exam Duration: | 90 minutes |
| Sample Questions: |  |
| Exam Way: | Pearson VUE testing centers (In-person) |
| Pre Condition: | Recommended: JNCIA-Junos certification |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/tracks/enterprise-routing-switching/jncis-ent.html |
Juniper JN0-351 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: High Availability | - VRRP and redundancy protocols - High availability design and integration |
| Topic 2: BGP | - BGP configuration and troubleshooting |
| Topic 3: Layer 2 Security | - Port security implementation - DHCP snooping - Dynamic ARP inspection - Common Layer 2 attack mitigation |
| Topic 4: Protocol Independent Routing | - Routing fundamentals |
| Topic 5: Layer 2 Switching or VLANs | - Ports and tagging - Frame processing - Native VLANs and voice VLANs - Bridging components - Configuration, monitoring, and troubleshooting - Inter-VLAN routing - VLAN concepts and functionalities |
| Topic 6: IS-IS | - IS-IS configuration and troubleshooting |
| Topic 7: Tunnels | - Tunnel technologies |
| Topic 8: Spanning Tree Protocol | - Port roles interpretation - Bridge priority and port cost optimization - STP topology design and troubleshooting - Loop prevention and redundancy - Convergence issues identification |
| Topic 9: OSPF | - OSPF configuration and troubleshooting |
JN0-351 Exam FAQ for Every Candidate
Recommended: JNCIA-Junos certification Since requirements change over time, confirm the latest on the official Juniper exam page before scheduling.
Juniper recommends these training resources for the Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam:
Follow the training with steady self-testing — the 192 practice questions from ExamCost make that routine easy to maintain.
ExamCost issues a full refund if you take the Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam within 60 days of purchase and do not pass. The policy does not apply if the exam is taken within 3 days of purchase, if the exam was never actually taken, or to free materials or expired orders, and the candidate name must match the payer name. Submit a scan of your enrollment slip and the official Score Report PDF within 2 days of the exam; claims are processed within 7 days. Alternatively, exchange for two free exam products of equal value and keep your original update service. Orders arrive by email within 1 minute — contact support if nothing arrives within 2 hours.
The official Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) outline defines 9 domains. The leading three are Tunnels, IS-IS, and BGP. The full list is in the topics section above, and ExamCost's 192 practice questions cover each one.
The JN0-351 exam is a Juniper certification exam validating the Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) syllabus shown above. It belongs to these credential paths: JNCIS-ENT. Candidates of different ages and backgrounds take it to advance their careers in 2026, and ExamCost prepares all of them with 192 practice questions in PDF, Desktop Test Engine, and Online Test Engine formats.
Three versions of the 192 practice questions for the Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam, each with its own strengths: a printable, expert-prepared PDF with instant download and free demo; a Desktop Test Engine for Windows that simulates the real exam with two practice modes and works offline; and an Online Test Engine for any browser on Windows, Mac, Android, and iOS with test history and performance review. Choose whichever suits your taste — all are included, along with 365 days of free updates, a 50% renewal discount afterward, and unlimited computer installations.
The Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam requires Not specified (Pass/Fail status available immediately) to pass, and registration costs $300 USD. Retaking costs the same fee again, so a readiness check with the ExamCost engines is a sensible investment before booking.
The Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam contains 65 to complete within 90 minutes. Timed practice in the ExamCost Desktop Test Engine prepares you for exactly that rhythm.
Pearson VUE testing centers (In-person) Register for the Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam through these official channels:
Once booked, your ExamCost practice questions reach your inbox within 1 minute — the countdown to exam day can start at once.
Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions:
In addition to the MAC addresses, what information is stored in the bridging table? (Choose two.)
- A. ether type details
- B. interface details
- C. preamble of Ethernet packet
- D. MAC learned time
Correct Answer: B,D 🗳️
You are asked to change the setting for the LSAs age out back to the default value. In this scenario, which time interval will accomplish this task?
- A. 1800 seconds
- B. 3600 seconds
- C. 300 seconds
- D. 600 seconds
Correct Answer: B 🗳️
What is the default MAC age-out timer on an EX Series switch?
- A. 300 minutes
- B. 300 seconds
- C. 30 seconds
- D. 30 minutes
Correct Answer: B 🗳️
Explanation: Only visible for ExamCost members. You can sign-up / login (it's free).
In an OSPF network, what is the purpose of a virtual link?
- A. To provide a backup path for the underlay IGP.
- B. To load-balance traffic between two ABRs.
- C. To connect an area that does not have direct physical connectivity to the backbone area through a transit area.
- D. To replace the need for area 0 entirely.
Correct Answer: C 🗳️
Explanation: Only visible for ExamCost members. You can sign-up / login (it's free).
Which statement correctly describes the purpose of Bidirectional Forwarding Detection (BFD) in Junos OS?
- A. BFD is a routing protocol used to exchange prefix information.
- B. BFD replaces the need for a routing protocol's own hello mechanism entirely.
- C. BFD can only be used with static routes.
- D. BFD provides rapid failure detection for a link or path between two adjacent devices, independent of the routing protocol in use.
Correct Answer: D 🗳️
Explanation: Only visible for ExamCost members. You can sign-up / login (it's free).
