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The JN0-280 exam tests the candidates' knowledge of data center architecture, technologies, and network designs. JN0-280 exam also covers the configuration, management, and troubleshooting of Juniper Networks' data center devices, including the EX Series switches and QFX Series switches. JN0-280 Exam is designed to measure the candidate's understanding of the fundamentals of data center networking, including Ethernet, virtualization, and Layer 2 and Layer 3 protocols.

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The JN0-280 exam is a comprehensive test that covers a wide range of topics related to data center technologies. JN0-280 exam is designed to test your knowledge of data center architecture, network design and implementation, troubleshooting, and management. JN0-280 Exam consists of multiple-choice questions and is designed to be completed within 90 minutes. To pass the exam, you must achieve a score of at least 65%.

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q85-Q90):

NEW QUESTION # 85
Under which Junos hierarchy is a static route configured?

A. routing-instances
B. routing-options
C. protocols
D. system

Answer: B

NEW QUESTION # 86
A switch receives a frame with a MAC address of FF-FF-FF-FF-FF-FF. Which action will the switch take on this frame?

A. It will flood it out of all interfaces, except for the directly connected VLAN.
B. It will flood it out of all interfaces.
C. It will flood it out of all interfaces, except for the next-hop interface.
D. It will flood it out of all interfaces, except for the ingress interface.

Answer: D

Explanation:
AMAC address of FF-FF-FF-FF-FF-FFis the Ethernetbroadcast address. When a switch receives a frame with this destination MAC address, it is required to forward the frame to all interfaces except the one it was received on.
Step-by-Step Breakdown:
* Broadcast Frame Handling:When a frame with the broadcast MAC address is received, the switch will flood it out of all active ports that belong to the same VLAN as the incoming frame. The broadcast frame is not sent back out of the ingress interface (the interface where the frame was originally received).
* Purpose of Flooding:Broadcasting is used to ensure that the frame reaches all devices within the broadcast domain (all devices within the same VLAN), which may not have a specific entry for the MAC address in their MAC address table.
Juniper Reference:
* Layer 2 Frame Forwarding: Juniper switches flood broadcast frames to all ports in the same VLAN, except the port the frame was received on.

NEW QUESTION # 87
When a MAC limiting violation occurs, the switch performs which two actions by default? (Choose two.)

A. The port is disabled.
B. It drops the packet.
C. No logging takes place.
D. It causes Layer 2 loops.

Answer: A,B

Explanation:
When aMAC limiting violationoccurs on a Juniper switch, the switch will perform the following actions by default:
Step-by-Step Breakdown:
* Port Disabled:When the number of MAC addresses on an interface exceeds the configured limit, the port isautomatically disabledto prevent further violations. This is a protective mechanism to prevent MAC address flooding.
* Packet Dropped:Additionally, packets from the violating MAC address aredroppedto prevent any further communication from that address. This ensures that only valid MAC addresses are allowed to communicate through the interface.
* Example Configuration:
set ethernet-switching-options secure-access-port interface <interface-name> mac-limit 5
* If more than five MAC addresses are learned, the port is disabled, and excess packets are dropped.
Juniper Reference:
* MAC Limiting: When the switch detects a MAC limiting violation, it disables the port and drops further packets from the violating MAC addresses to maintain network security.

NEW QUESTION # 88
During a BGP Graceful Restart, what happens to the routes learned from the restarting neighbor?

A. Their metric is increased to prevent their use.
B. They are advertised to other BGP neighbors.
C. They are marked as stale but kept in the routing table.
D. They are immediately removed from the routing table.

Answer: C

NEW QUESTION # 89
Which of the following statements are correct about the Spine/Leaf architecture? (Choose two)

A. Each Leaf switch is directly connected to every server in the data center.
B. The architecture reduces the need for inter-switch link (ISL) redundancy.
C. Spine switches can connect directly to the data center's external network.
D. The Spine layer switches interconnect various Leaf switches.

Answer: C,D

NEW QUESTION # 90
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First-grade Latest JN0-280 Exam Guide for Real Exam

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q85-Q90):

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