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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q87-Q92):

NEW QUESTION # 87
In OSPF, how is the Router ID determined?

A. By a manually configured value in the router configuration.
B. By the lowest MAC address of the router.
C. By the highest loopback interface IP address.
D. By the highest IP address on any of the router's active interfaces.

Answer: C

NEW QUESTION # 88
Which statement is correct about a five-stage IP fabric topology?

A. There is a maximum of three hops between any end-devices
B. There is a maximum of five hops between any end-devices
C. They are typically deployed in small to medium data centers
D. They are commonly referred to as interconnected data centers

Answer: B

NEW QUESTION # 89
Which two statements are true about how switches handle Layer 2 traffic? (Choose two.)

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

Answer: B,D

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 # 90
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 asterisk indicates that the interface is active.
C. The ge-0/0/12 interfaces is an access port.
D. The default VLAN is a user defined VLAN name.

Answer: B

NEW QUESTION # 91
Exhibit:

R2 received an OSPF update from R1, and it received the same update from R3.
Referring to the exhibit, what will R2 do?

A. R2 ignores the update from R3.
B. R2 ignores the update from R1.
C. R2 does nothing with R3's update.
D. R2 acknowledges R3 and discards it.

Answer: A

Explanation:
In the exhibit, R2 receives the same OSPF update from both R1 and R3. OSPF has mechanisms toprevent unnecessary processing of duplicate LSAs (Link-State Advertisements).
Step-by-Step Breakdown:
* OSPF LSA Processing:
* OSPF uses LSAs to exchange link-state information between routers. When a router receives an LSA, it checks if it already has a copy of the LSA in its Link-State Database (LSDB).
* Duplicate LSAs:If R2 has already received and processed the update from R1, it willignore the update from R3because it already has the same LSA in its database. OSPF uses the concept of flooding, but it does not reprocess LSAs that it already knows about.
* R2 Behavior:R2 will keep the update from R1 (the first one it received) and will ignore the same LSA from R3, as it is already in the LSDB.
Juniper Reference:
* OSPF LSA Processing: Junos adheres to OSPF standards, ensuring that duplicate LSAs are not processed multiple times to avoid unnecessary recalculations.

NEW QUESTION # 92
......

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High Pass-Rate New JN0-280 Test Labs & Accurate JN0-280 Reliable Study Questions: Data Center, Associate (JNCIA-DC)

Juniper JN0-280 Exam | New JN0-280 Test Labs - Easily Pass Exam If Choosing our JN0-280 Reliable Study Questions

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q87-Q92):

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