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The JN0-280 certification exam is a computer-based exam that consists of 65 multiple-choice questions. Candidates have 90 minutes to complete the exam. JN0-280 Exam is administered by Pearson VUE, a leading provider of computer-based testing services.
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Juniper JN0-280 exam, also known as the Data Center, Associate (JNCIA-DC) exam, is a certification exam designed for individuals who want to demonstrate their knowledge and skills in the area of data center networking. JN0-280 exam is based on the Juniper Networks Junos operating system and covers a range of topics including data center architecture, virtualization, networking technologies, and storage solutions. Passing the JN0-280 Exam is a prerequisite for many advanced level Juniper certifications.
NEW QUESTION # 86
Which two statements are true with regards to MACsec?
Answer: B,D
NEW QUESTION # 87
Which statement is correct about an IRB interface?
Answer: C
Explanation:
AnIRB (Integrated Routing and Bridging)interface provides routing functionality between VLANs at Layer 3, allowing devices in different VLANs to communicate with each other.
Step-by-Step Breakdown:
* IRB Functionality:
* The IRB interface enables routing between different VLANs by acting as a Layer 3 gateway.
Traffic within the same VLAN is handled by Layer 2 switching, while traffic between VLANs is routed through the IRB interface.
* Layer 3 Routing Between VLANs:
* Each VLAN can be assigned an IP address on the IRB interface, which allows traffic to flow between VLANs based on Layer 3 IP routing.
Juniper Reference:
* IRB Interface Configuration: Juniper supports IRB for inter-VLAN routing on devices like the EX and QFX series switches, facilitating Layer 3 communication in data centers.
NEW QUESTION # 88
Which statement is correct about per-flow load balancing?
Answer: C
Explanation:
Per-flow load balancingensures that packets within the same flow are always forwarded over the same path, ensuring that packet order is preserved.
Step-by-Step Breakdown:
* Flow Definition:A flow is typically defined by a combination of packet attributes like source
/destination IP, source/destination port, and protocol type. Packets that belong to the same flow are routed over the same path to avoid reordering.
* Per-Flow Behavior:Inper-flow load balancing, the hashing algorithm ensures that all packets in a particular flow use thesame egress port, maintaining order across the network.
Juniper Reference:
* Load Balancing in Juniper: This method ensures that flows are balanced across multiple paths while preventing packet reordering within a single flow.
NEW QUESTION # 89
Which statement is correct about member interfaces when creating a LAG?
Answer: B
Explanation:
When creating aLAG (Link Aggregation Group)in Junos, theduplex settingsandlink speedmust be the same across all member interfaces.
Step-by-Step Breakdown:
* LAG Overview:A LAG combines multiple physical interfaces into a single logical interface to increase bandwidth and provide redundancy. All member links must act as a single cohesive unit.
* Interface Requirements:
* Duplex: All member interfaces must operate in the same duplex mode (either full-duplex or half- duplex). Mismatched duplex settings can cause performance issues, packet drops, or interface errors.
* Link Speed: All interfaces in the LAG must have the same link speed (e.g., all interfaces must be
1 Gbps or 10 Gbps). Mismatched speeds would prevent the interfaces from functioning correctly within the LAG.
* Configuration and Validation: Ensure that all member interfaces have identical settings before adding them to the LAG. These settings can be checked using the show interfaces command, and the LAG can be configured using:
set interfaces ae0 aggregated-ether-options link-speed 10g
set interfaces ge-0/0/1 ether-options 802.3ad ae0
Juniper Reference:
* LAG Configuration: Duplex and link speed must be consistent across member interfaces to ensure proper LAG operation in Juniper devices.
NEW QUESTION # 90
What is the primary purpose of using aggregate routes in a network?
Answer: B
NEW QUESTION # 91
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