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Quiz High Hit-Rate Juniper - JN0-281 - Data Center, Associate (JNCIA-DC) Test Assessment

Almost everyone is trying to get Data Center, Associate (JNCIA-DC) (JN0-281) certification to update their CV or get the desired job. Nowadays, everyone is interested in taking the Data Center, Associate (JNCIA-DC) (JN0-281) exam because it has multiple benefits for the future. Every candidate faces just one problem, and that is not getting updated Data Center, Associate (JNCIA-DC) (JN0-281) practice questions.

Juniper JN0-281 Exam Syllabus Topics:

Topic
Details

Topic 1

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 2

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 3

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 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

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.

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q131-Q136):

NEW QUESTION # 131
You want to minimize topology disruptions in your network when the rpd process restarts on a device. Which service would accomplish this task?

A. Virtual Chassis
B. link aggregation groups
C. graceful restart (GR)
D. Bidirectional Forwarding Detection (BFD)

Answer: C

Explanation:
Graceful Restart (GR) is a feature that allows a router to maintain forwarding even when the routing process (e.g., the rpd process in Junos) is restarting, minimizing disruption to the network.
Step-by-Step Breakdown:
Graceful Restart Function:
During a GR event, the forwarding plane continues to forward packets based on existing routes, while the control plane (rpd process) is restarting. This prevents traffic loss and maintains routing stability.
Minimizing Disruptions:
GR is particularly useful in ensuring continuous packet forwarding during software upgrades or routing protocol process restarts.
Juniper Reference:
Graceful Restart in Junos: GR ensures high availability by maintaining forwarding continuity during control plane restarts, enhancing network reliability.

NEW QUESTION # 132
Which two statements about IBGP are correct? (Choose two.)

A. IBGP uses AS path for loop prevention.
B. By default, IBGP has a TTL of 1.
C. IBGP uses full mesh for loop prevention.
D. By default, IBGP has a TTL of 255.

Answer: C,D

Explanation:
IBGP (Internal Border Gateway Protocol) is used to exchange routing information between routers within the same AS (Autonomous System).
Step-by-Step Breakdown:
TTL of 255:
By default, IBGP sessions are established with a TTL (Time to Live) value of 255. This allows IBGP neighbors to communicate over multiple hops within the AS without requiring any additional configuration.
Full Mesh Requirement:
IBGP requires a logical full mesh between all IBGP routers to ensure that routing information is fully distributed within the AS. Since IBGP does not propagate routes learned from one IBGP peer to another by default, a full mesh topology is needed unless route reflectors or BGP confederations are used.
Juniper
Reference: IBGP Full Mesh: Juniper recommends using route reflectors in large networks to simplify IBGP full-mesh requirements.

NEW QUESTION # 133
A generated route is configured under which hierarchy?

A. [edit routing-instance]
B. [edit routing-options]
C. [edit policy-options]
D. [edit protocols]

Answer: B

Explanation:
A generated route in Junos OS is configured under the [edit routing-options] hierarchy.
Step-by-Step Breakdown:
Generated Routes:
A generated route is created based on the presence of more specific routes in the routing table. It acts as a summary route and is generated when any of its contributing routes are active. This is commonly used to create aggregate routes in OSPF, BGP, or other protocols.
Configuration Hierarchy:
The configuration for generated routes is placed under [edit routing-options], where other static and routing policies are also defined.
Command Example:
set routing-options generate route 10.10.0.0/16
Juniper
Reference: Routing Options: Juniper routers use the routing-options hierarchy to configure generated routes and other static routing behaviors.

NEW QUESTION # 134
Which statement is correct about a five-stage IP fabric topology?

A. There is a maximum of three hops between any end-devices
B. They are typically deployed in small to medium data centers
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 # 135
Martian addresses are:

A. Unroutable addresses that are generally filtered by routers.
B. Special routes for interplanetary communication.
C. Addresses used in MPLS.
D. Addresses used for load balancing.

Answer: A

NEW QUESTION # 136
......

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