JUNIPER JN0-280 RELIABLE TEST PREPARATION & PDF4TEST - LEADING OFFER IN CERTIFICATION EXAMS PRODUCTS

Juniper JN0-280 Reliable Test Preparation & PDF4Test - Leading Offer in Certification Exams Products

Juniper JN0-280 Reliable Test Preparation & PDF4Test - Leading Offer in Certification Exams Products

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The JNCIA-DC certification exam is a multiple-choice exam that consists of 65 questions. Candidates are given 90 minutes to complete the exam and must achieve a passing score of 65% or higher to earn the certification. JN0-280 Exam is available in multiple languages, including English, Japanese, and Simplified Chinese, making it accessible to individuals from different parts of the world. Passing the JNCIA-DC certification exam demonstrates a candidate's proficiency in data center networking and validates their knowledge and skills to potential employers.

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Juniper JN0-280 Exam | JN0-280 Reliable Test Preparation - Help you Prepare for JN0-280 Exam Efficiently

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q120-Q125):

NEW QUESTION # 120
Which Junos OS routing table stores IPv6 addresses?

  • A. inet.6
  • B. inet.0
  • C. inet6.0
  • D. inet0.6

Answer: C

Explanation:
In Junos OS, routing information is stored in different routing tables depending on the protocol and address family. For IPv6 addresses, the routing table used isinet6.0.
Step-by-Step Explanation:
* Routing Tables in Junos:
* inet.0: This is the primary routing table for IPv4 unicast routes.
* inet6.0: This is the primary routing table for IPv6 unicast routes.
* inet.3: This routing table is used for MPLS-related routing.
* Other routing tables, like inet.1, inet.2, are used for multicast and other specific purposes.
* inet6.0 Routing Table:When IPv6 is enabled on a Juniper router, all the IPv6 routes are stored in the inet6.0table. This includes both direct routes (connected networks) and learned routes (from dynamic routing protocols like OSPFv3, BGP, etc.).
* Verification:To view IPv6 routes, the command show route table inet6.0 is used. This will display the contents of the IPv6 routing table, showing the network prefixes, next-hop addresses, and protocol information for each route.
Juniper Reference:
* Junos Command: Use show route table inet6.0 to check IPv6 routing entries.
* IPv6 Routing: Ensure that the IPv6 protocol is enabled on interfaces and that routingprotocols like OSPFv3 or BGP are properly configured for IPv6 traffic handling.


NEW QUESTION # 121
Which BGP message type is used to establish peering sessions?

  • A. Keepalive
  • B. Update
  • C. Notification
  • D. Open

Answer: D


NEW QUESTION # 122
What is the primary purpose of MAC address filtering on a switch?

  • A. To distribute traffic evenly across multiple links.
  • B. To prevent unauthorized devices from accessing the network.
  • C. To control the flow of encrypted data.
  • D. To limit the rate of incoming packets.

Answer: B


NEW QUESTION # 123
A generated route is configured under which hierarchy?

  • A. [edit protocols]
  • B. [edit routing-instance]
  • C. [edit routing-options]
  • D. [edit policy-options]

Answer: C

Explanation:
Agenerated routein Junos OS is configured under the[edit routing-options]hierarchy.
Step-by-Step Breakdown:
* Generated Routes:A generated route is created based on the presence of more specific routes in the routing table. It acts as a summary route and is generated when any of its contributing routes are active.
This is commonly used to create aggregate routes in OSPF, BGP, or other protocols.
* Configuration Hierarchy:The configuration for generated routes is placed under[edit routing-options]
, where other static and routing policies are also defined.
* Command Example:
set routing-options generate route 10.10.0.0/16
Juniper Reference:
* Routing Options: Juniper routers use the routing-options hierarchy to configure generated routes and other static routing behaviors.


NEW QUESTION # 124
When troubleshooting an OSPF neighborship, you notice that the router stopped at the ExStart state. What is the cause of this result?

  • A. There is an area ID mismatch.
  • B. There is an interval timing mismatch.
  • C. There is an MTU mismatch.
  • D. The priority is set to 255.

Answer: C

Explanation:
When an OSPF (Open Shortest Path First) neighborship is stuck in the ExStart state, it usually points to a mismatch in Maximum Transmission Unit (MTU) settings between two routers trying to establish the adjacency. The ExStart state is where OSPF routers negotiate the master-slave relationship and exchange DBD (Database Description) packets.
Step-by-Step Breakdown:
* OSPF Neighbor States: OSPF goes through several states to establish an adjacency with a neighbor:
* Down: No hello packets have been received.
* Init: Hello packets are received, but bidirectional communication isn't confirmed.
* 2-Way: Bidirectional communication is established.
* ExStart: The routers are negotiating who will be the master and who will be the slave, and begin to exchange DBD packets.
* Exchange: The routers start exchanging the database information.
* Loading: The routers process the Link-State Advertisements (LSAs).
* Full: The adjacency is fully established.
* MTU Mismatch Issue:During the ExStart state, both OSPF routers must agree on their MTU values. If there is an MTU mismatch between the two routers, OSPF neighbors will fail to move from the ExStart to the Exchange state. The router with the larger MTU setting will not accept DBD packets from the router with a smaller MTU because the packets may exceed the smaller MTU size.
In Juniper devices, this behavior can be identified by examining the MTU settings using the show interfaces command and ensuring both routers have matching MTU configurations. To resolve this issue, either match the MTU settings on both routers or configure OSPF to ignore MTU mismatches using the command set protocols ospf ignore-mtu.
Juniper Reference:
* Junos Command: show ospf neighbor helps diagnose neighbor states.
* MTU Adjustment: set interfaces <interface-name> mtu <size> can be used to set the MTU values correctly.


NEW QUESTION # 125
......

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