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Test Certification Juniper JN0-280 Cost & Valid JN0-280 Exam Objectives

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The JN0-280 Certification program is ideal for IT professionals who wish to specialize in data center networking. Data Center, Associate (JNCIA-DC) certification program provides candidates with the knowledge and skills needed to configure and manage data center networks using Juniper Networks technologies. Data Center, Associate (JNCIA-DC) certification program is also an excellent way for individuals to demonstrate their expertise in data center networking to potential employers and clients.

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q60-Q65):

NEW QUESTION # 60
Referring to the exhibit, how many broadcast domains are present in the topology?

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

Answer: D

NEW QUESTION # 61
When configuring MAC address filtering on a Junos switch, which feature is primarily used?

A. RADIUS
B. Access Control Lists (ACLs)
C. Firewall filters
D. Port security

Answer: D

NEW QUESTION # 62
Leaf and spine data centers are used to better accommodate which type of traffic?

A. east-west
B. south-east
C. north-east
D. north-west

Answer: A

Explanation:
In modern data centers, the shift toward leaf-spine architectures is driven by the need to handle increased east- west traffic, which is traffic between servers within the same data center. Unlike traditional hierarchical data center designs, where most traffic was "north-south" (between users and servers), modern applications often involve server-to-server communication (east-west) to enable services like distributed databases, microservices, and virtualized workloads.
Leaf-Spine Architecture:
* Leaf Layer: This layer consists of switches that connect directly to servers or end-host devices. These switches serve as the access layer.
* Spine Layer: The spine layer comprises high-performance switches that provide interconnectivity between leaf switches. Each leaf switch connects to every spine switch, creating a non-blocking fabric that optimizes traffic flow within the data center.
East-West Traffic Accommodation:
In traditional three-tier architectures (core, aggregation, access), traffic had to traverse multiple layers, leading to bottlenecks when servers communicated with each other. Leaf-spine architectures address this by creating multiple equal-cost paths between leaf switches and the spine. Since each leaf switch connects directly to every spine switch, the architecture facilitates quick, low-latency communication between servers, which is essential for east-west traffic flows.
Juniper's Role:Juniper Networks provides a range of solutions that optimize for east-west traffic in a leaf- spine architecture, notably through:
* QFX Series Switches: Juniper's QFX series switches are designed for the leaf and spine architecture, delivering high throughput, low latency, and scalability to accommodate the traffic demands of modern data centers.
* EVPN-VXLAN: Juniper uses EVPN-VXLAN to create a scalable Layer 2 and Layer 3 overlay network across the data center. This overlay helps enhance east-west traffic performance by enabling network segmentation and workload mobility across the entire fabric.
Key Features That Support East-West Traffic:
* Equal-Cost Multipath (ECMP): ECMP enables the use of multiple paths between leaf and spine switches, balancing the traffic and preventing any one path from becoming a bottleneck. This is crucial in handling the high volume of east-west traffic.
* Low Latency: Spine switches are typically high-performance devices that minimize the delay between leaf switches, which improves the efficiency of server-to-server communications.
* Scalability: As the demand for east-west traffic grows, adding more leaf and spine switches is straightforward, maintaining consistent performance without redesigning the entire network.
In summary, the leaf-spine architecture is primarily designed to handle the increase ineast-west trafficwithin data centers, and Juniper provides robust solutions to enable this architecture through its switch platforms and software solutions like EVPN-VXLAN.

NEW QUESTION # 63
Which of the following statements are correct about the Spine/Leaf architecture? (Choose two)

A. Each Leaf switch is directly connected to every server in the data center.
B. Spine switches can connect directly to the data center's external network.
C. The architecture reduces the need for inter-switch link (ISL) redundancy.
D. The Spine layer switches interconnect various Leaf switches.

Answer: B,D

NEW QUESTION # 64
Which two statements describe an OSPF ABR? (Choose two.)

A. By default, an ABR must have one link in the OSPF backbone area.
B. By default, an ABR does not need to have any links in the backbone area.
C. By default, an ABR is an OSPF router with all of its links in one area.
D. By default, an ABR is an OSPF router with links in two areas.

Answer: A,D

NEW QUESTION # 65
......

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