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| Section | Objectives |
|---|---|
| Data Center Architecture | - Design principles for modern data center networks - Leaf-spine architecture concepts |
| Data Center Underlay (IP Fabric) | - Routing protocols in data center environments - IP fabric design and routing fundamentals |
| Data Center Services | - Layer 2 and Layer 3 services - Multicast in data center environments |
| Operations, Automation, and Troubleshooting | - Network troubleshooting methodologies - Automation concepts in Junos environments - Operational best practices |
| EVPN-VXLAN Overlay | - EVPN control plane concepts - Interoperability and multitenancy design - VXLAN data plane and tunneling |
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NEW QUESTION # 52
You are using a single tenant data center with a bridged overlay architecture. In this scenario, how do hosts of the different virtual networks communicate with each other?
Answer: A
Explanation:
* Understanding Bridged Overlay Architecture:
* In a single-tenant data center using a bridged overlay architecture, virtual networks (VLANs) are typically isolated within the fabric, with traffic between these VLANs handled outside the fabric.
* Communication Between Different Virtual Networks:
* A. off-fabric using an external device:This is correct. In many bridged overlay architectures, communication between different virtual networks is handled off-fabric, often using an external router or firewall that connects the different VLANs. The fabric itself primarily provides Layer 2 connectivity within each VLAN, leaving inter-VLAN routing to be handled externally.
Data Center References:
* This design is common in smaller or simpler data center environments where a single tenant does not require complex on-fabric routing and prefers to handle inter-VLAN routing through dedicated devices.
NEW QUESTION # 53
Exhibit.
Referring to the exhibit, which statement is correct?
Answer: D
Explanation:
* Analyzing the Exhibit Output:
* The command ping overlay tunnel-type vxlan is used to test the VXLAN tunnel between two VTEPs (VXLAN Tunnel Endpoints). The output shows a warning about missing hash parameters, but more importantly, it displays the result: End-System Not Present.
* Understanding the Response:
* The message End-System Not Present indicates that the remote VTEP (192.168.2.20) did not find the MAC address 00:00:5E:00:53:CC in its forwarding table. This typically means that the MAC address is unknown to the remote VTEP, and as a result, it could not forward the packet to the intended destination.
Conclusion:
* Option B:Correct-The MAC address is unknown and is not in the forwarding table of the remote VTEP, which is why the system reports that the "End-System" is not present.
NEW QUESTION # 54
In an EVPN-VXLAN fabric, which statement describes the purpose of an EVPN Type 5 route?
Answer: B
Explanation:
EVPN Type 5 routes, also known as IP Prefix routes, are used to advertise Layer 3 reachability information for subnets or host routes across VXLAN domains. This allows inter-subnet routing between different VNIs or between data centers without requiring the destination MAC address to be known, which is especially useful for DCI scenarios and route summarization.
NEW QUESTION # 55
What are three actions available for MAC move limiting? (Choose three.)
Answer: A,B,C
Explanation:
MAC move limiting is a security feature used in network switches to detect and mitigate rapid changes in MAC address locations, which could indicate a network issue or an attack such as MAC flapping or spoofing.
When a MAC address is learned on a different interface than it was previously learned, the switch can take various actions to prevent potential issues.
drop: This action drops packets from the MAC address if it violates the move limit, effectively blocking communication from the offending MAC address.
log: This action logs the MAC move event without disrupting traffic, allowing network administrators to monitor and investigate the event.
shutdown: This action shuts down the interface on which the MAC address violation occurred, effectively stopping all traffic on that interface to prevent further issues.
NEW QUESTION # 56
You are asked to set up an IP fabric thatsupports Al or ML workloads. You have chosen to use lossless Ethernet in this scenario, which statement is correct about congestion management?
Answer: C
Explanation:
* Understanding Lossless Ethernet and Congestion Management:
* Lossless Ethernet is crucial for AI and ML workloads, where packet loss can significantly degrade performance. To implement lossless Ethernet, congestion management protocols like ECN (Explicit Congestion Notification) are used.
* Role of ECN in Congestion Management:
* Option A:In an IP fabric that supports lossless Ethernet, when a switch experiences congestion, it can mark packets using ECN. This marking notifies the source device of the congestion, allowing the source to reduce its transmission rate, thereby preventing packet loss.
Conclusion:
* Option A:Correct-The switch experiencing congestion notifies the source device via ECN marking.
NEW QUESTION # 57
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