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Data Center, Associate (JNCIA-DC) Exam Simulator - JN0-280 Free Demo & JN0-280 Training Pdf

The learning material is open in three excellent formats; Juniper JN0-280 dumps PDF, a desktop Juniper JN0-280 dumps practice test, and a web-based Juniper JN0-280 dumps practice test. Juniper JN0-280 dumps is organized by experts while saving the furthest down-the-line plan to them for the Juniper JN0-280 Exam. The sans bug plans have been given to you all to drift through the Data Center, Associate (JNCIA-DC) certificate exam.

Juniper JN0-280 (Data Center, Associate (JNCIA-DC)) certification exam is an entry-level certification exam that is designed to test the foundational knowledge of candidates in data center technologies. Data Center, Associate (JNCIA-DC) certification is ideal for IT professionals who want to validate their skills in configuring and managing Juniper Networks devices and technologies in a data center environment. The JN0-280 Certification Exam is part of the Juniper Networks Certification Program (JNCP) and is a prerequisite for higher-level certifications in the program.

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q81-Q86):

NEW QUESTION # 81
Which Junos operational mode command is used to troubleshoot issues with VLANs?

A. show vlans
B. monitor traffic
C. show interfaces
D. show ethernet-switching table

Answer: D

NEW QUESTION # 82
What roles do the Designated Router (DR) and Backup Designated Router (BDR) play in OSPF?

A. They redistribute routes between OSPF and non-OSPF networks.
B. They reduce the number of adjacencies on broadcast networks.
C. They determine the shortest path first algorithm.
D. They are responsible for generating LSAs for external routes.

Answer: B

NEW QUESTION # 83
Exhibit:

Referring to the exhibit, which next hop will be preferred in the routing table?

A. Neither next hop will be preferred.
B. Both next hops will be preferred.
C. Next hop IP address 172.25.20.254 will be preferred.
D. Next hop IP address 172.25.20.200 will be preferred.

Answer: D

Explanation:
In the exhibit, we see a static route configuration with two possible next hops for the default route (0.0.0.0/0):
* next-hop 172.25.20.254with the default preference of 7.
* qualified-next-hop 172.25.20.200with a preference of 6.
Step-by-Step Breakdown:
* Preference Value:In Junos OS, thepreferencevalue is used to determine which route should be preferred in the routing table. The lower the preference value, the higher the priority for the route.
* Comparison:In this case:
* The next hop172.25.20.254has a preference of7.
* Thequalified-next-hop 172.25.20.200has a preference of6.
* Preferred Next Hop:Since172.25.20.200has a lower preference (6) compared to172.25.20.254(7), it will be the preferred next hop in the routing table, assuming both next hops are reachable.
Juniper Reference:
* Qualified Next Hop: In Junos, static routes with multiple next-hop options are selected based on the preference value, with the lower value being preferred.

NEW QUESTION # 84
What is the primary purpose of an IRB Layer 3 interface?

A. to provide a default VLAN ID
B. to provide port security
C. to provide inter-VLAN routing
D. to provide load balancing

Answer: C

Explanation:
The primary purpose of anIRB (Integrated Routing and Bridging)interface is to enableinter-VLAN routing in a Layer 3 environment. An IRB interface in Junos combines the functionality of both Layer 2 bridging (switching) and Layer 3 routing, allowing devices in different VLANs to communicate with each other.
Step-by-Step Breakdown:
* VLANs and Layer 2 Switching:Devices within the same VLAN can communicate directly through Layer 2 switching. However, communication between devices in different VLANs requires Layer 3 routing.
* IRB Interface for Inter-VLAN Routing:The IRB interface provides a Layer 3 gateway for each VLAN, enabling routing between VLANs. Without an IRB interface, devices in different VLANs would not be able to communicate.
* Configuration:In Juniper devices, the IRB interface is configured by assigning Layer 3 IP addresses to it. These IP addresses serve as the default gateway for devices in different VLANs.
Example configuration:
set interfaces irb unit 0 family inet address 192.168.1.1/24
set vlans vlan-10 l3-interface irb.0
This allows VLAN 10 to use the IRB interface for routing.
Juniper Reference:
* IRB Use Case: Inter-VLAN routing is essential in data centers where multiple VLANs are deployed, and Juniper's EX and QFX series switches support IRB configurations for this purpose.

NEW QUESTION # 85
When considering bidirectional forwarding detection, which two statements are correct? (Choose two.)

A. You can configure BFD per interface within the protocol stanza.
B. The BFD default multiplier is 5.
C. The BFD default minimum interval is 3.
D. The BFD operation always consists of minimum intervals and multipliers.

Answer: A,D

Explanation:
Bidirectional Forwarding Detection (BFD)is a protocol used to detect faults in the forwarding path between two routers. It provides rapid failure detection, enhancing the performance of routing protocols like OSPF, BGP, and IS-IS.
Step-by-Step Breakdown:
* Per Interface Configuration:BFD can be configured on aper-interfacebasis within the protocol stanza (e.g., OSPF, BGP). This allows granular control over where BFD is enabled and the failure detection intervals for specific interfaces.
* Minimum Interval and Multiplier:BFD uses aminimum interval(the time between BFD control packets) and amultiplier(the number of missed packets before the path is declared down). The combination of these two defines the detection time for failures.
Juniper Reference:
* BFD Configuration: In Juniper, BFD is configurable within routing protocol stanzas, with the failure detection mechanism always based on minimum intervals and multipliers.

NEW QUESTION # 86
......

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