[Feb 26, 2026] Valid JN0-281 Test Answers & Juniper JN0-281 Exam PDF [Q42-Q62]

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[Feb 26, 2026] Valid JN0-281 Test Answers & Juniper JN0-281 Exam PDF

Realistic JN0-281 Exam Dumps with Accurate & Updated Questions

Juniper JN0-281 Exam Syllabus Topics:

Topic	Details
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	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.
Topic 3	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 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	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.

QUESTION 42
Which route is preferred by the Junos OS software routing tables?

Static

Aggregate

Direct

BGP

QUESTION 43
How can OSPF be configured to prefer one route over another?

By setting a higher cost on the preferred route.

By configuring route redistribution.

By adjusting interface bandwidth.

By setting a lower cost on the preferred route.

QUESTION 44
What type of BGP is used for routing within the same autonomous system?

IBGP

EBGP

Static BGP

Dynamic BGP

QUESTION 45
Exhibit:

Referring to the exhibit, what is the route preference of the 172.25.11.254 next hop?

130

140

QUESTION 46
What are two reasons why you would deploy an IP fabric instead of a traditional Layer 2 network in a data center? (Choose two.)

Layer 2 networks only support a single broadcast domain.

IP fabrics are better suited to smaller networks where scale is less important.

Layer 3 networks support load balancing.

Layer 2 networks are susceptible to loops.

QUESTION 47
Which statement is correct about areas in OSPF?

An OSPF area is used to segment Layer 2 broadcast domains.

OSPF areas are used to isolate the effects of a broadcast storm.

OSPF areas are used to reduce the size of the link-state database.

An OSPF area is used to signify the autonomous system to which each device belongs.

QUESTION 48
Exhibit:

How many stages are shown in the exhibit?

QUESTION 49
Which of the following is an important consideration when configuring BFD?

Setting a very high multiplier to avoid false positives

Using the same BFD interval on all devices in the network

Adjusting the BFD interval and multiplier according to network needs

Disabling all other failure detection mechanisms

QUESTION 50
In Junos, which command is used to display the status of all interfaces?

show interfaces terse

show vlan brief

show interfaces descriptions

show ethernet-switching table

QUESTION 51
Referring to the exhibit, why are the BGP routes hidden?

Load balancing is not enabled.

There are too many hops to the destination.

The BGP next hop is unreachable.

Other routes are selected because of better metrics.

QUESTION 52
Which VLAN tagging method inserts a 4-byte tag into the Ethernet frame?

ISL

Dot1Q

Q-in-Q

MPLS

QUESTION 53
What is the behavior of the default export policy for OSPF?

Accept all routes.

Reject all routes.

Redistribute all routes.

Forward all routes.

QUESTION 54
Which statement is correct about aggregate routes?

The default next hop is discard.

The default next hop is readvertise.

The default next hop is resolve.

The default next hop is reject.

QUESTION 55
In the context of Link Aggregation Groups (LAG), what is the primary purpose of LACP?

To provide a method for encrypting data packets

To dynamically manage the bundling of several physical ports

To reduce the speed of data transfer

To increase the error rate in data transmission

QUESTION 56
You are creating an IP fabric underlay and want to use OSPF as your routing protocol.
In this scenario, which statement is correct?

All leaf devices must be configured in separate OSPF areas.

All leaf and spine devices must be the same model to ensure the proper load-balancing behavior.

Interface speeds should be the same throughout the fabric to ensure that all links are utilized.

All spine devices must use the same router ID.

QUESTION 57
In the Junos OS, which feature is used to create an alternate next hop with a unique preference for a static route?

Preference

Resolve

Next-hop

Qualified-next-hop

QUESTION 58
Exhibit:

Referring to the exhibit, what is the route preference of the 172.25.11.254 next hop?

130

140

QUESTION 59
What is a key characteristic of traditional multi-tier data center architectures?

They primarily use a flat network design.

They consist of a modular, scalable design.

They are organized in a hierarchical model with distinct layers.

They exclusively use Layer 3 routing.

QUESTION 60
Generated routes in a network are mainly used to:

Reduce the overall size of the routing table.

Manually configure specific network routes.

Automatically create a route when a specified condition is met.

Summarize external routes into the network.

QUESTION 61
You are configuring OSPF in your network as shown in the exhibit. R1 has been configured with interface metrics. All other links in the network are using the default interface metric.
In this scenario, which OSPF interface on R1 will be preferred when routing traffic between R1 and R5?

ge-0/0/0

ge-0/0/3

ge-0/0/1

ge-0/0/2

QUESTION 62
You are configuring an aggregate route. In this scenario, which two statements are correct? (Choose two.)

Reject will silently drop the traffic.

Discard will silently drop the traffic.

Reject will send an ICMP Destination Unreachable message back to the sender.

Discard will send an ICMP Destination Unreachable message back to the sender.

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[Feb 26, 2026] Valid JN0-281 Test Answers & Juniper JN0-281 Exam PDF [Q42-Q62]

Juniper JN0-281 Exam Syllabus Topics:

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