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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q193-Q198):

NEW QUESTION # 193
Which Junos operational mode command is used to troubleshoot issues with VLANs?

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

Answer: C

NEW QUESTION # 194
Exhibit:

Referring to the exhibit, which behavior does this configuration enable on the ge-0/0/1.0 interface?

A. This configuration enables the interface to learn and remember MAC addresses, until the device is rebooted.
B. This configuration enables a MAC address learned on the interface to be persistently retained in the Ethernet-switching table, even after a reboot.
C. This configuration enables the device to place a MAC address that persistently causes network errors into a special protected VLAN.
D. This configuration enables the device to shut down the interface when a particular MAC address persistently sends broadcast traffic.

Answer: B

Explanation:
The configuration in the exhibit shows the persistent-learning feature enabled on interface ge-0/0/1.0.
Step-by-Step Breakdown:
Persistent Learning:
Persistent-learning ensures that the MAC addresses learned on the interface are retained in the Ethernet-switching table, even after a device reboot. This prevents the need to re-learn MAC addresses after the device restarts, improving stability and reducing downtime.
Use Case:
This feature is particularly useful in environments where the re-learning of MAC addresses could cause temporary disruptions or delays in communication, such as in critical Layer 2 network segments.
Command Example:
set switch-options interface ge-0/0/1.0 persistent-learning
Juniper
Reference: Persistent MAC Learning: In Junos, enabling persistent-learning ensures that learned MAC addresses are not lost during reboots, contributing to smoother network operations in environments where stability is crucial.

NEW QUESTION # 195
Which of the following are features of storm control on Junos switches? (Choose two)

A. It supports thresholds for broadcast, multicast, and unknown unicast traffic.
B. It automatically reroutes traffic during a storm.
C. It encrypts broadcast and multicast traffic.
D. It can be configured to shut down a port during a storm.

Answer: A,D

NEW QUESTION # 196
In the Junos OS, which feature is used to create an alternate next hop with a unique preference for a static route?

A. Qualified-next-hop
B. Next-hop
C. Preference
D. Resolve

Answer: A

Explanation:
In Junos OS, the qualified-next-hop feature is used to specify an alternate next hop for a static route, along with a unique preference value.
Step-by-Step Breakdown:
Qualified-Next-Hop:
A qualified-next-hop allows you to define multiple next hops for a static route, each with its own preference. This provides flexibility by allowing the router to choose the best available next hop based on reachability and preference.
Use Case:
If the primary next hop becomes unreachable, the router can automatically switch to the alternate next hop defined by the qualified-next-hop with a higher preference value.
Command Example:
set routing-options static route 10.10.10.0/24 qualified-next-hop 192.168.1.1 preference 5 set routing-options static route 10.10.10.0/24 qualified-next-hop 192.168.1.2 preference 10 Preference:
The next hop with the lowest preference is chosen first. If it becomes unavailable, the router will use the higher preference next hop.
Juniper
Reference: Qualified-Next-Hop: This feature is used to configure backup or alternate next hops for static routes in Juniper devices.

NEW QUESTION # 197
When considering bidirectional forwarding detection, which two statements are correct? (Choose two.)

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

Answer: B,C

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 a per-interface basis 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 a minimum interval (the time between BFD control packets) and a multiplier (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 # 198
......

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Verified Juniper JN0-281: New Data Center, Associate (JNCIA-DC) Test Sample - Professional PassTestking Latest JN0-281 Exam Objectives

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q193-Q198):

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