JUNIPER JN0-281 EXAM OUTLINE, KEY JN0-281 CONCEPTS

Juniper JN0-281 Exam Outline, Key JN0-281 Concepts

Juniper JN0-281 Exam Outline, Key JN0-281 Concepts

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Tags: JN0-281 Exam Outline, Key JN0-281 Concepts, Guaranteed JN0-281 Questions Answers, Reliable JN0-281 Test Price, Latest JN0-281 Test Camp

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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
  • 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 4
  • 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 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.

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Key JN0-281 Concepts | Guaranteed JN0-281 Questions Answers

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q132-Q137):

NEW QUESTION # 132
Which two statements are correct about aggregated Ethernet bundles? (Choose two.)

  • A. You must specify which interfaces are members of a specific aggregated Ethernet bundle.
  • B. You must purchase a services license for the chassis to support aggregate Ethernet interfaces.
  • C. You must enable LACP when configuring aggregated Ethernet bundles.
  • D. You must enable the chassis to support aggregated Ethernet interfaces.

Answer: A,D


NEW QUESTION # 133
What is the main advantage of using MACsec?

  • A. It provides Layer 2 encryption for data confidentiality and integrity.
  • B. It creates multiple virtual networks over a single physical infrastructure.
  • C. It allows for the use of longer cable runs.
  • D. It increases the speed of the network.

Answer: A


NEW QUESTION # 134
What are two consequences of having all network devices in a single collision domain? (Choose two.)

  • A. The chance of packet collision is decreased.
  • B. The chance of packet collision is increased.
  • C. The amount of network resource consumption does not change.
  • D. The amount of network resource consumption is increased.

Answer: B,D

Explanation:
A collision domain is a network segment where data packets can "collide" with one another when being sent on the same network medium.
Step-by-Step Breakdown:
Increased Collision Probability:
If all devices are in a single collision domain, the likelihood of packet collisions increases as more devices attempt to send packets simultaneously, leading to network inefficiencies. Increased Resource Consumption:
More collisions result in increased network resource consumption as devices need to retransmit packets, causing higher utilization of bandwidth and slowing down network performance. Juniper Reference: Collision Domains: Proper network segmentation using switches reduces collision domains, thereby improving network performance and reducing packet collisions.


NEW QUESTION # 135
You have configured a load balancing policy.
Which statement is correct about applying the policy?

  • A. The policy is applied as an export policy under the routing protocol's hierarchy.
  • B. The policy is applied as an import policy under the routing protocol's hierarchy.
  • C. The policy is applied as an export policy under routing-options forwarding table.
  • D. The policy is applied as an import policy under routing-options forwarding table.

Answer: C


NEW QUESTION # 136
A routing policy has been created to advertise OSPF routes in BGP.
Which statement is correct in this scenario?

  • A. Apply the policy as an export policy within BGP.
  • B. Apply the policy as an export policy within OSPF.
  • C. Apply the policy as an import policy within OSPF.
  • D. Apply the policy as an import policy within BGP.

Answer: A

Explanation:
When advertising OSPF routes into BGP, the appropriate routing policy should be applied as an export policy in BGP.
Step-by-Step Breakdown:
OSPF to BGP Route Advertisement:
Routes learned via OSPF (a dynamic IGP) need to be exported into BGP to be advertised to external BGP peers. In Junos OS, this is done using export policies.
Export Policies in BGP:
An export policy controls which routes are advertised out of a BGP session. In this scenario, the routing policy must be applied to BGP as an export policy to export the OSPF-learned routes to external BGP peers.
Policy Configuration:
Example configuration:
set policy-options policy-statement EXPORT_OSPF term 1 from protocol ospf set policy-options policy-statement EXPORT_OSPF term 1 then accept set protocols bgp group <group-name> export EXPORT_OSPF This policy ensures that only OSPF routes are exported into BGP. Juniper Reference: Routing Policy: Export policies are used in BGP to control route advertisements to peers, including those learned via OSPF.


NEW QUESTION # 137
......

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