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Juniper JN0-351 Exam Overview:

Certification Vendor:Juniper Networks
Exam Name:Enterprise Routing and Switching, Specialist (JNCIS-ENT)
Exam Number:JN0-351
Exam Duration:90 minutes
Real Exam Qty:65
Exam Format:Single-answer multiple choice, Multiple choice, Multiple-answer multiple choice
Certificate Validity Period:3 years
Related Certifications:JNCIP-ENT
JNCIE-ENT
JNCIA-Junos
Available Languages:English
Exam Price:USD varies by region (typically around $200โ€“$300 USD)
Passing Score:~60-70%
Recommended Training:Juniper Learning Portal
Juniper Enterprise Routing & Switching Training
Exam Registration:Pearson VUE Juniper Exams
Juniper Certification Registration
Sample Questions:Juniper JN0-351 Sample Questions
Exam Way:Pearson VUE proctored exam (online or test center)
Pre Condition:JNCIA-Junos (JN0-105) recommended as prerequisite knowledge
Official Syllabus URL:https://www.juniper.net/us/en/training/certification/certification-tracks/enterprise-routing-switching/jncis-ent.html

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Juniper JN0-351 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Layer 2 Security: This topic introduces Layer 2 protection mechanisms and firewall filters to fortify network security. Practical skills in configuring, monitoring, and troubleshooting these features prepare candidates to address exam objectives and real-world challenges effectively.
Topic 2
  • Tunnels: The fundamentals of IP tunneling are emphasized, highlighting their requirements and functionalities. Mastery in configuring, monitoring, and troubleshooting tunnels equips professionals to meet the demands of the JN0-351 exam.
Topic 3
  • Layer 2 Switching or VLANs: This topic deepens the understanding of Layer 2 switching operations within the Junos OS, including VLAN concepts and benefits. Experienced networking professionals gain insights into configuration, monitoring, and troubleshooting techniques essential for network segmentation and efficiency.
Topic 4
  • Spanning Tree: Networking professionals explore the principles and advantages of the Spanning Tree Protocol (STP) to ensure loop-free topologies in Layer 2 networks.
Topic 5
  • IS-IS: Aspiring Juniper networking professionals enhance their understanding of IS-IS routing protocols. This topic equips candidates with the knowledge to configure and monitor IS-IS systems, addressing specific exam challenges and practical applications.
Topic 6
  • BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
Topic 7
  • Protocol Independent Routing: An essential domain for understanding routing components outside protocol dependencies, this topic enhances expertise in configuring, monitoring, and troubleshooting critical elements.
Topic 8
  • OSPF: The concepts and operational details of OSPF are explored, providing tools for routing efficiency. Configuration and troubleshooting mastery ensure readiness for both the exam and complex enterprise environments.

Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q100-Q105):

NEW QUESTION # 100
Which two types of tunnels are able to be created on all Junos devices? (Choose two.)

Answer: A,B

Explanation:
GRE tunnels can be created on all Junos devices. GRE is a tunneling protocol that encapsulates a wide variety of network layer protocols inside virtual point-to-point links.
IP-IP tunnels can also be created on all Junos devices. IP-IP tunneling is used to encapsulate IP packets within IP packets, providing a simple way to tunnel IP traffic.


NEW QUESTION # 101
What is the default MAC age-out timer on an EX Series switch?

Answer: B

Explanation:
Explanation
The default MAC age-out timer on an EX Series switch is 300 seconds12. The MAC age-out timer is the maximum time that an entry can remain in the MAC table before it "ages out," or is removed31. This configuration can influence efficiency of network resource use by affecting the amount of traffic that is flooded to all interfaces1. When traffic is received for MAC addresses no longer in the Ethernet routing table, the router floods the traffic to all interfaces1.


NEW QUESTION # 102
In RSTP, which three port roles are associated with the discarding state? (Choose three.)

Answer: A,C,E

Explanation:
In Rapid Spanning Tree Protocol (RSTP), there are several port roles that determine the behavior of the port in the spanning tree. The roles include root, designated, alternate, backup, and disabled.
The discarding state is associated with the backup, alternate, and disabled roles. In a stable topology with consistent port roles throughout the network, RSTP ensures that every root port and designated port immediately transition to the forwarding state while all alternate and backup ports are always in the discarding state. Disabled ports are also in the discarding state.


NEW QUESTION # 103
Which two statements are true about high availability on Junos devices? (Choose two.)

Answer: A,D


NEW QUESTION # 104
Which two types of tunnels are able to be created on all Junos devices? (Choose two.)

Answer: B,C

Explanation:
Junos devices support various types of tunnels for different purposes 1 2 .
* Option B is correct. Generic Routing Encapsulation (GRE) is a tunneling protocol that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links over an Internet Protocol network 1 . Junos devices support GRE tunnels 1 .
* Option D is correct. IPsec (Internet Protocol Security) is a protocol suite for securing Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session 1
. Junos devices support IPsec tunnels 1 .
* Option A is incorrect. Spanning Tree Protocol (STP) is not a type of tunnel. It's a network protocol designed to prevent loops in a bridged Ethernet local area network 2 .
* Option C is incorrect. While Junos devices do support IP-IP (also known as IP tunneling), it's not supported on all Junos devices 1 .


NEW QUESTION # 105
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