VALID JN0-281 EXAM TOPICS, CERT JN0-281 EXAM

Valid JN0-281 Exam Topics, Cert JN0-281 Exam

Valid JN0-281 Exam Topics, Cert JN0-281 Exam

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Tags: Valid JN0-281 Exam Topics, Cert JN0-281 Exam, JN0-281 Certification Torrent, JN0-281 Brain Dumps, Reliable JN0-281 Exam Syllabus

Our Juniper JN0-281 exam guide has not equivocal content that may confuse exam candidates. All question points of our Data Center, Associate (JNCIA-DC) JN0-281 study quiz can dispel your doubts clearly. Get our Data Center, Associate (JNCIA-DC) JN0-281 Certification actual exam and just make sure that you fully understand it and study every single question in it by heart.

Juniper JN0-281 Exam Syllabus Topics:

TopicDetails
Topic 1
  • 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 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
  • 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 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.

>> Valid JN0-281 Exam Topics <<

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q90-Q95):

NEW QUESTION # 90
Which command on a router is used to view the current routing table?

  • A. show route
  • B. check route information
  • C. show routing-table
  • D. display ip routing-table

Answer: A


NEW QUESTION # 91
Which operation mode command will display the mapping between the VLAN ID and ports on a switch?

  • A. show interfaces terse
  • B. show route
  • C. show vlans
  • D. show ethernet-switching table

Answer: C

Explanation:
To display the mapping between VLAN IDs and ports on a Juniper switch, the show vlans command is used.
Step-by-Step Breakdown:
VLAN Information:
The show vlans command displays detailed information about VLAN configurations, including the VLAN ID, associated interfaces (ports), and VLAN membership.
Command Example:
show vlans
This command will provide an output listing each VLAN, its ID, and the interfaces associated with the VLAN, enabling network engineers to quickly verify VLAN to port mappings.
Juniper
Reference: VLAN Verification: Use the show vlans command to verify which VLANs are configured on the switch and the ports that are members of those VLANs.


NEW QUESTION # 92
Which two statements describe an IP fabric? (Choose two.)

  • A. An IP fabric allows devices to always be one hop away.
  • B. An IP fabric uses spine and leaf devices.
  • C. An IP fabric provides traffic load sharing.
  • D. An IP fabric depends on Layer 2 switching.

Answer: B,C

Explanation:
An IP fabric is a network topology designed to provide a scalable, low-latency architecture that is typically implemented in modern data centers. It uses spine and leaf switches and enables efficient traffic load sharing across the network.
Step-by-Step Breakdown:
Spine-Leaf Architecture:
Leaf Devices: These switches connect to servers and edge devices within the data center. Each leaf switch connects to every spine switch.
Spine Devices: These high-performance switches interconnect all the leaf switches. There are no direct connections between leaf switches or spine switches. This architecture ensures that any two endpoints within the fabric are only one hop away from each other, minimizing latency.
Traffic Load Sharing:
An IP fabric leverages Equal-Cost Multipath (ECMP) to distribute traffic evenly across all available paths between leaf and spine switches, providing effective load balancing. This ensures that no single link becomes a bottleneck and that traffic is distributed efficiently across the network.
Juniper Reference:
Juniper provides QFX Series switches optimized for IP fabric topologies, allowing for scalable deployments in modern data centers.
EVPN-VXLAN: Often used in IP fabrics to extend Layer 2 services across the fabric with Layer 3 underlay, enabling both efficient routing and bridging.


NEW QUESTION # 93
In the Junos OS, which feature is used to create an alternate next hop with a unique preference for a static route?

  • A. Qualified-next-hop
  • B. Preference
  • C. Resolve
  • D. Next-hop

Answer: A

Explanation:
In Junos OS, the qualified-next-hop feature is used to specify an alternate next hop for a static route, along with a unique preference value.
Step-by-Step Breakdown:
Qualified-Next-Hop:
A qualified-next-hop allows you to define multiple next hops for a static route, each with its own preference. This provides flexibility by allowing the router to choose the best available next hop based on reachability and preference.
Use Case:
If the primary next hop becomes unreachable, the router can automatically switch to the alternate next hop defined by the qualified-next-hop with a higher preference value.
Command Example:
set routing-options static route 10.10.10.0/24 qualified-next-hop 192.168.1.1 preference 5 set routing-options static route 10.10.10.0/24 qualified-next-hop 192.168.1.2 preference 10 Preference:
The next hop with the lowest preference is chosen first. If it becomes unavailable, the router will use the higher preference next hop.
Juniper Reference:
Qualified-Next-Hop: This feature is used to configure backup or alternate next hops for static routes in Juniper devices.


NEW QUESTION # 94
Which two statements are correct about EVPN-VXLAN overlay networking? (Choose two.)

  • A. OSPF provides the control plane within the overlay network.
  • B. An encapsulation of the original packet is required to transport the packet across the network.
  • C. BGP provides the control plane within the overlay network.
  • D. It is the only option to provide reachability between servers that reside in the same network segment in a data center.

Answer: B,C

Explanation:
EVPN-VXLAN is an overlay technology used in data center networks to extend Layer 2 services over a Layer 3 network.
Step-by-Step Breakdown:
BGP Control Plane:
BGP (Border Gateway Protocol) is used as the control plane for EVPN-VXLAN. BGP advertises MAC addresses and IP address reachability information across the VXLAN network, enabling efficient multi-tenant Layer 2 connectivity over a Layer 3 infrastructure.
Encapsulation:
VXLAN (Virtual Extensible LAN) encapsulates Layer 2 frames into Layer 3 packets. This encapsulation allows Layer 2 traffic to be transported across a Layer 3 network, effectively creating a tunnel for Ethernet frames.
Juniper Reference:
EVPN-VXLAN Configuration: Juniper supports EVPN-VXLAN with BGP as the control plane, allowing scalable Layer 2 connectivity over a routed infrastructure in modern data centers.


NEW QUESTION # 95
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