JN0-280 EXAM TUTORIAL | JN0-280 LATEST BRAINDUMPS EBOOK

JN0-280 Exam Tutorial | JN0-280 Latest Braindumps Ebook

JN0-280 Exam Tutorial | JN0-280 Latest Braindumps Ebook

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Tags: JN0-280 Exam Tutorial, JN0-280 Latest Braindumps Ebook, Valid JN0-280 Mock Exam, JN0-280 Latest Exam Materials, JN0-280 Test Sample Online

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q42-Q47):

NEW QUESTION # 42
Which two protocols can you use for a data center underlay network? (Choose two)

  • A. EBGP
  • B. EVPN
  • C. VXLAN
  • D. OSPF

Answer: A,D


NEW QUESTION # 43
Referring to the exhibit, which statement is correct?

  • A. The ge-0/0/0 interface has been explicitly assigned to a VLAN named default.
  • B. The ge-0/0/12 interfaces is an access port.
  • C. The asterisk indicates that the interface is active.
  • D. The default VLAN is a user defined VLAN name.

Answer: C


NEW QUESTION # 44
When troubleshooting an OSPF neighborship, you notice that the router stopped at the ExStart state. What is the cause of this result?

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

Answer: D

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 # 45
What is the function of the 'Weight' attribute in BGP, and where is it used in the route selection process?

  • A. It determines the stability of a route and is checked after the Local Preference attribute.
  • B. It is used to balance load among multiple links and is considered after the MED attribute.
  • C. It is used to prioritize routes received from different EBGP peers and is considered before the AS_PATH 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 # 46
Fill in the blank: In BGP, the ___________ attribute is used to influence the best path selection process.

  • A. AS_PATH
  • B. Local Preference
  • C. MED (Metric or Multi-Exit Discriminator)
  • D. Community

Answer: C


NEW QUESTION # 47
......

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