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Juniper JN0-650 Exam Overview:

Certification Vendor:Juniper Networks
Exam Name:Enterprise Routing and Switching, Professional (JNCIP-ENT)
Exam Number:JN0-650
Exam Price:$400 USD
Passing Score:Pass / Fail (variable scale)
Available Languages:English, Japanese
Related Certifications:JNCIS-ENT (JN0-349)
JNCIA-ENT (JN0-347)
Certificate Validity Period:3 years
Exam Duration:120 minutes
Exam Format:Multiple Choice, Simulation, Drag and Drop, Multiple Select
Real Exam Qty:70-80
Sample Questions:Juniper JN0-650 Sample Questions
Exam Way:Online Proctored (OnVue) / In-Person Testing Center (Pearson VUE)
Pre Condition:JNCIA-ENT (JN0-347) or equivalent knowledge recommended; no mandatory prerequisite for exam eligibility
Official Syllabus URL:https://www.juniper.net/us/en/training/certification/track-data-center.html

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Juniper JN0-650 Exam Syllabus Topics:

TopicDetails
Topic 1
  • IP Telephony Features: This section focuses on features supporting VoIP deployments including Power over Ethernet, LLDP
  • LLDP-MED protocols, and voice VLAN implementation.
Topic 2
  • Ethernet Switching and Spanning Tree: This section covers advanced Layer 2 switching including filter-based VLANs, private VLANs, MVRP, Layer 2 tunneling via Q-in-Q and L2PT, plus MSTP and VSTP protocols.
Topic 3
  • EVPN: This section addresses Ethernet VPN technology for Layer 2 over Layer 3 connectivity, covering EVPN route types, VXLAN encapsulation, and multi-homing configurations.
Topic 4
  • Class of Service (CoS): This domain covers QoS mechanisms in Junos including CoS processing, header fields, forwarding classes, classification, policers, schedulers, drop profiles, shaping, and rewrite rules.
Topic 5
  • IP Multicast: This domain addresses one-to-many communication using multicast routing, covering addressing, ASM vs SSM models, RPF, IGMP
  • snooping, PIM sparse-mode, rendezvous points, Anycast RP, MSDP, and routing policies.

Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) Sample Questions (Q117-Q122):

NEW QUESTION # 117
You have deployed a Juniper switch that hosts multiple VLANs.
Which statement is true?

Answer: A


NEW QUESTION # 118
Exhibit

Your network receives the full Internet BGP routing table from two different ISPs. You want your local routers to use Provider A to forward all Internet traffic as long as Provider A is available.
Referring to the exhibit, which two actions would satisfy this requirement? (Choose two.)

Answer: A,C

Explanation:
In BGP path selection, the Local Preference attribute is one of the most common ways to influence outbound traffic from an Autonomous System (AS). It is a well-known discretionary attribute that is propagated throughout the AS to tell internal routers which path is preferred for a specific destination.
Priority Rule: In the BGP selection algorithm, a higher local preference value is always preferred over a lower one. The default value in Junos OS is 100.
Influencing Outbound Traffic (Option A): To ensure that Provider A is always preferred, you would apply an import policy on R1 (the router connected to Provider A) to set the local preference of all received routes to a value higher than the default (e.g., 200). Since 200 > 100, R3 and R4 will prefer the path via R1.
Alternative Method (Option C): Conversely, you can achieve the same result by applying an import policy on R2 (the router connected to Provider B) to set the local preference to a value lower than the default (e.g., 50).
Since the routes from R1 remain at the default of 100, and 100 > 50, the path via R1 (Provider A) is preferred.
Why B and D are incorrect: Setting a higher local preference on R2 (Option B) would make Provider B the preferred exit point. Setting a lower local preference on R1 (Option D) would make Provider A the least preferred exit point.


NEW QUESTION # 119
You are asked to configure 802.1X on your access ports to allow only a single device to authenticate.
In this scenario, which configuration would you use?

Answer: B


NEW QUESTION # 120
You run a multivendor switching environment where you have configured VSTP. You have 450 VLANs and notice that some of your VLANs do not function properly. How should you change the configuration to get all
450 VLANs working?

Answer: A

Explanation:
VSTP (VLAN Spanning Tree Protocol) is Juniper ' s implementation that provides a separate spanning tree instance for each VLAN, ensuring compatibility with Cisco ' s PVST+. However, it has significant scaling limitations:
Instance Limits: On many Juniper EX and QFX series switches, VSTP is restricted to a maximum of 253 or
510 VLAN instances depending on the software version (ELS vs. non-ELS). In your scenario, having 450 VLANs exceeds the standard 253-instance limit found on many platforms.
The Solution (Option B): When the number of VLANs exceeds the VSTP capacity, the recommended best practice is to enable RSTP (Rapid Spanning Tree Protocol). Unlike VSTP, RSTP runs a single spanning tree instance for the entire switch, regardless of how many VLANs are configured. This ensures that all 450 VLANs are protected from loops without hitting the hardware ' s instance-count limit.
Other Options: Option A (force-version) only affects the BPDU format for compatibility but doesn ' t solve the instance limit. Option C and Option D are parameter tuning actions that do not address the architectural limitation of the number of running instances.


NEW QUESTION # 121
Click the Exhibit button.

Referring to the exhibit, which two statements are correct? (Choose two.)

Answer: A,C

Explanation:
The best-effort queue (queue 0) does not have a reserved bandwidth, so it effectively has 100% of remaining bandwidth after the other queues are serviced. For assured-forwarding (queue 2), the bandwidth reservation is 10%, so during sustained congestion, any traffic exceeding this allocation can be dropped to enforce the bandwidth limits.


NEW QUESTION # 122
......

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