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Juniper JN0-281 Exam Syllabus Topics:

Topic	Details
Topic 1	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 2	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 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	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 5	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.

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q27-Q32):

NEW QUESTION # 27
Which of the following statements are true regarding Graceful Restart (GR)? (Choose two)

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

Answer: B,C

NEW QUESTION # 28
You want to enable a Junos device to support aggregated Ethernet interfaces. In this scenario, which configuration hierarchy would you use?

A. [edit chassis]
B. [edit switch-options]
C. [edit system]
D. [edit interfaces]

Answer: A

Explanation:
To configure aggregated Ethernet (AE) interfaces on a Junos device, the configuration is done under the [edit chassis] hierarchy.
Step-by-Step Breakdown:
Chassis Configuration:
The chassis configuration is responsible for enabling the hardware to support Link Aggregation Groups (LAGs), allowing multiple physical interfaces to be bundled into a single logical interface for load balancing and redundancy.
Command Example:
set chassis aggregated-devices ethernet device-count <number>
This command enables a specific number of aggregated Ethernet interfaces on the device.
Juniper
Reference: LAG Configuration in Junos: The chassis hierarchy is used to allocate and manage hardware resources for aggregated Ethernet interfaces in Juniper devices.

NEW QUESTION # 29
Which two statements are correct about rules for EBGP and IBGP? (Choose two.)

A. EBGP routes are more preferred than IBGP routes.
B. EBGP peers have a TTL of 255, while IBGP peers have a TTL of 1.
C. IBGP routes are more preferred than EBGP routes.
D. EBGP peers have a TTL of 1, while IBGP peers have a TTL of 255.

Answer: A,D

Explanation:
EBGP (External BGP) and IBGP (Internal BGP) operate with different rules due to the nature of their relationships.
Step-by-Step Breakdown:
TTL Differences:
EBGP: By default, EBGP peers have a TTL of 1, meaning they must be directly connected, or the TTL needs to be manually increased for multihop EBGP.
IBGP: IBGP peers within the same AS have a TTL of 255, as they are expected to communicate over multiple hops within the AS.
Preference for EBGP Routes:
Routes learned via EBGP are typically preferred over IBGP routes. This is because EBGP routes are considered more reliable since they originate outside the AS, while IBGP routes are internal.
Juniper Reference:
BGP Configuration: The different handling of TTL and route preferences between EBGP and IBGP ensures proper route selection and security within Junos-based networks.

NEW QUESTION # 30
Which of the following BGP attributes is considered first in the route selection process?

A. AS Path Length
B. MED
C. Origin
D. Local Preference

Answer: D

NEW QUESTION # 31
Which type of route is used to represent a summary of multiple smaller networks?

A. Static route
B. Aggregate route
C. Generated route
D. Dynamic route

Answer: B

NEW QUESTION # 32
......

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Free PDF 2025 Updated Juniper JN0-281 Latest Braindumps Book

Free PDF Quiz 2025 JN0-281: Accurate Data Center, Associate (JNCIA-DC) Latest Braindumps Book

Juniper JN0-281 Exam Syllabus Topics:

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q27-Q32):

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