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Trustworthy Juniper JN0-281 Practice | New Soft JN0-281 Simulations

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Juniper JN0-281 Exam Syllabus Topics:

Topic
Details

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

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

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

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 5

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.

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q111-Q116):

NEW QUESTION # 111
Which of the following statements are true regarding Graceful Restart (GR)? (Choose two)

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

Answer: B,D

NEW QUESTION # 112
What is the default route preference of a static route in the Junos OS?

A. 0
B. 1
C. 2
D. 3

Answer: A

Explanation:
In Junos OS, the default route preference for a static route is 5. Route preference values are used to determine which route should be installed in the routing table when multiple routes to the same destination are available.
Step-by-Step Breakdown:
Static Route Preference:
A static route, by default, has a preference of 5, making it a highly preferred route. Lower preference values are more preferred in Junos, meaning static routes take precedence over most dynamic routing protocol routes, such as OSPF (preference 10) or BGP (preference 170).
Route Preference:
Route preference is a key factor in the Junos routing decision process. Routes with lower preference values are preferred and installed in the forwarding table.
Juniper Reference:
Static Routes: In Junos, the default preference for static routes is 5, making them more preferred than most dynamic routes.

NEW QUESTION # 113
What is the first route selection mechanism for IBGP?

A. origin
B. as path
C. local preference
D. MED

Answer: C

NEW QUESTION # 114
Which two prefixes are contributing routes to a 10.20.0.0/18 aggregate route? (Choose two)

A. 10.20.0.0/16
B. 10.20.100.0/24
C. 10.20.0.0/24
D. 10.20.60.0/23

Answer: C,D

NEW QUESTION # 115
Referring to the exhibit, how many milliseconds will pass before the BGP neighbor is considered dead?

A. 9000ms
B. 2000ms
C. 3000ms
D. 1000ms

Answer: C

NEW QUESTION # 116
......

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