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Free PDF 2025 JN0-280: High-quality Data Center, Associate (JNCIA-DC) Examcollection Vce

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Juniper JN0-280 exam is an excellent certification exam for IT professionals who want to validate their knowledge and skills in data center networking using Juniper Networks technologies. JN0-280 exam covers a wide range of topics, including data center architecture, technologies, and network designs, making it a comprehensive exam that tests the candidate's foundational knowledge of data center networking.

Juniper JN0-280 Certification Exam is an entry-level certification that is designed to validate the skills and knowledge of a candidate in the field of data center technologies. It is also known as the Data Center, Associate (JNCIA-DC) certification exam. Passing JN0-280 exam will demonstrate that the candidate has a strong foundation in data center concepts, architectures, and technologies.

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q90-Q95):

NEW QUESTION # 90
You are creating an IP fabric underlay and want to use OSPF as your routing protocol.
In this scenario, which statement is correct?

A. All spine devices must use the same router ID.
B. All leaf and spine devices must be the same model to ensure the proper load-balancing behavior.
C. All leaf devices must be configured in separate OSPF areas.
D. Interface speeds should be the same throughout the fabric to ensure that all links are utilized.

Answer: D

Explanation:
When creating anIP fabric underlayusingOSPFas the routing protocol, consistentinterface speedsare important to ensure optimal traffic distribution and utilization of all links.
Step-by-Step Breakdown:
* OSPF and Interface Speeds:OSPF calculates the cost of a link based on its bandwidth. The default cost calculation in OSPF is:
A black text on a white background Description automatically generated

* If interface speeds vary significantly, OSPF may choose paths with lower cost (higher bandwidth), resulting in some links being underutilized.
* Equal Utilization:To ensure that all links are equally utilized in an IP fabric, it is recommended to maintain uniform interface speeds across the fabric. This ensures balanced load sharing across all available paths.
Juniper Reference:
* IP Fabric with OSPF: Juniper recommends consistent interface speeds to maintain even traffic distribution and optimal link utilization in IP fabric underlay designs.

NEW QUESTION # 91
Exhibit:

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

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

Answer: D

Explanation:
In the exhibit, we see two next-hop addresses for the default static route (0.0.0.0/0):
* The first next hop is172.25.11.254, with no specified preference.
* The second next hop is172.25.11.200, with a specified preference of140.
Step-by-Step Breakdown:
* Default Static Route Preference:If no preference is explicitly set for a next hop in Junos, it defaults to5 for static routes.
* Determining Preference:In this case, the next hop172.25.11.254does not have an explicit preference defined, so it will use the default value of5. The second next hop has a preference of140, which is higher,meaning it will only be used if the primary next hop is unavailable.
Juniper Reference:
* Static Route Preference: In Junos, the default preference for static routes is5, and this value is applied unless overridden by the preference parameter.

NEW QUESTION # 92
Which two statements are true about how switches handle Layer 2 traffic? (Choose two.)

A. Traffic is forwarded based on the source MAC address.
B. The MAC address is learned based on the source MAC address.
C. Traffic is forwarded based on the destination MAC address.
D. The MAC address is learned based on the destination MAC address.

Answer: B,C

Explanation:
In Layer 2 switching, switches learn MAC addresses based on thesource MAC addressof incoming frames and forward frames based on thedestination MAC address.
Step-by-Step Breakdown:
* MAC Learning:When a switch receives a frame, it records thesource MAC addressand the port on which it arrived. This allows the switch to know where to send traffic destined for that MAC address.
* Forwarding Based on Destination:The switch then looks at thedestination MAC addressand forwards the frame out of the port associated with that MAC address. If the MAC is unknown, the switch floods the frame to all ports.
Juniper Reference:
* Layer 2 Switching: Juniper switches use source MAC addresses to build MAC tables and forward traffic based on the destination MAC address.

NEW QUESTION # 93
What is the function of the 'Weight' attribute in BGP, and where is it used in the route selection process?

A. It is used to prioritize routes received from different EBGP peers and is considered before the AS_PATH attribute.
B. It determines the stability of a route and is checked after the Local Preference attribute.
C. It is used to balance load among multiple links and is considered after the MED attribute.
D. It is a Cisco-specific attribute used to prefer paths from one BGP speaker over another, evaluated before the Local Preference.

Answer: D

NEW QUESTION # 94
What statement is true about load-balancing?

A. Load balancing is only supported after applying an advanced license.
B. Load balancing is only supported by dynamic routing protocols.
C. Load balancing on Juniper devices is processed per-flow.
D. Load balancing on Juniper devices is processed per-packet.

Answer: C

NEW QUESTION # 95
......

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