JUNIPER JN0-281 TEST SCORE REPORT - BOOKS JN0-281 PDF

Juniper JN0-281 Test Score Report - Books JN0-281 PDF

Juniper JN0-281 Test Score Report - Books JN0-281 PDF

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Tags: JN0-281 Test Score Report, Books JN0-281 PDF, Online JN0-281 Bootcamps, New JN0-281 Test Experience, JN0-281 Updated CBT

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Juniper JN0-281 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Data Center Routing Protocols BGP
  • OSPF: This section of the exam measures skills of a Network Operations Specialist and covers the operation and key concepts of the OSPF protocol. It explains elements such as the link-state database, OSPF packet types, and router IDs, including how adjacencies and designated routers work within areas. The section then transitions to BGP, outlining its basic operations, message types, attributes, and the path selection process. It also discusses both IBGP and EBGP roles. Lastly, the section reviews how to configure, monitor, and troubleshoot OSPF and BGP using routing policies and various tools.
Topic 2
  • Protocol-Independent Routing: This section of the exam measures the skills of a Routing Engineer and covers routing features that function independently of any specific protocol. It includes static, aggregate, and generated routes, along with the concept of martian addresses. Routing instances and Routing Information Base (RIB) groups are introduced, as well as techniques like load balancing and filter-based forwarding. Configuration, monitoring, and troubleshooting aspects of these routing components are also covered in this section.
Topic 3
  • Data Center Architectures: This section of the exam measures the skills of a Data Center Architect and covers foundational knowledge about various data center designs. It includes traditional multitier architectures as well as more modern IP fabric architectures using spine-leaf topologies. The section also touches on Layer 2 and Layer 3 strategies for forwarding traffic, the differences between overlay and underlay networks, and introduces Ethernet VPN–Virtual Extensible LAN (EVPN-VXLAN), explaining its basic purpose and role in data center environments.
Topic 4
  • Layer 2 Switching and VLANs: This section of the exam measuresthe skills of a Network Support Engineer and covers the essential concepts of Layer 2 switching operations within Junos OS. It includes an overview of Ethernet switching and bridging, providing an understanding of how Layer 2 networks function. The section also introduces VLAN concepts, focusing on port modes, VLAN tagging methods, and the purpose of Integrated Routing and Bridging (IRB). It further explores the practical side by addressing how to configure, monitor, and troubleshoot both Layer 2 switching and VLANs.
Topic 5
  • High Availability: This section of the exam measures the skills of a Data Center Reliability Engineer and covers strategies to ensure continuous network availability. It includes features like Link Aggregation Groups (LAG), Graceful Restart (GR), Bidirectional Forwarding Detection (BFD), and Virtual Chassis. It also provides a basic understanding of how to configure, monitor, and troubleshoot each of these high-availability components to maintain resilient network performance.

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q56-Q61):

NEW QUESTION # 56
When considering bidirectional forwarding detection, which two statements are correct? (Choose two.)

  • A. The BFD operation always consists of minimum intervals and multipliers.
  • B. You can configure BFD per interface within the protocol stanza.
  • C. The BFD default minimum interval is 3.
  • D. The BFD default multiplier is 5.

Answer: A,B

Explanation:
Bidirectional Forwarding Detection (BFD) is a protocol used to detect faults in the forwarding path between two routers. It provides rapid failure detection, enhancing the performance of routing protocols like OSPF, BGP, and IS-IS.
Step-by-Step Breakdown:
Per Interface Configuration:
BFD can be configured on a per-interface basis within the protocol stanza (e.g., OSPF, BGP). This allows granular control over where BFD is enabled and the failure detection intervals for specific interfaces.
Minimum Interval and Multiplier:
BFD uses a minimum interval (the time between BFD control packets) and a multiplier (the number of missed packets before the path is declared down). The combination of these two defines the detection time for failures.
Juniper Reference:
BFD Configuration: In Juniper, BFD is configurable within routing protocol stanzas, with the failure detection mechanism always based on minimum intervals and multipliers.


NEW QUESTION # 57
Which statement is correct about a five-stage IP fabric topology?

  • A. They are typically deployed in small to medium data centers
  • B. There is a maximum of three hops between any end-devices
  • C. There is a maximum of five hops between any end-devices
  • D. They are commonly referred to as interconnected data centers

Answer: C


NEW QUESTION # 58
Why is EVPN often used in conjunction with VXLAN in modern data centers?

  • A. To physically separate different customer environments.
  • B. To enable direct Internet access for applications.
  • C. To increase the physical bandwidth of the underlying network.
  • D. For providing Layer 2 connectivity over a Layer 3 fabric.

Answer: D


NEW QUESTION # 59
When configuring High Availability components, which of the following practices are recommended? (Choose two)

  • A. Regularly update firmware to non-recommended versions.
  • B. Implement regular testing of failover mechanisms.
  • C. Use a single path for data and control traffic.
  • D. Ensure physical redundancy of critical components.

Answer: B,D


NEW QUESTION # 60
Which of the following statements are true regarding Graceful Restart (GR)? (Choose two)

  • A. It requires support from both the restarting router and its neighbors.
  • B. It decreases network stability during protocol restarts.
  • C. It helps in maintaining uninterrupted forwarding during a routing process restart.
  • D. It is used to increase the convergence time of the network.

Answer: A,C


NEW QUESTION # 61
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