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| Section | Objectives |
|---|---|
| Data Center Services | - Layer 2 and Layer 3 services - Multicast in data center environments |
| EVPN-VXLAN Overlay | - Interoperability and multitenancy design - EVPN control plane concepts - VXLAN data plane and tunneling |
| Data Center Architecture | - Design principles for modern data center networks - Leaf-spine architecture concepts |
| Operations, Automation, and Troubleshooting | - Automation concepts in Junos environments - Network troubleshooting methodologies - Operational best practices |
| Data Center Underlay (IP Fabric) | - Routing protocols in data center environments - IP fabric design and routing fundamentals |
>> JN0-683 Valid Test Question <<
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NEW QUESTION # 66
Which parameter is used to associate a received route with a local VPN route table?
Answer: B
Explanation:
* Understanding VPN Route Table Association:
* In MPLS/VPN and EVPN networks, theroute-target communityis a BGP extended community attribute used to control the import and export of VPN routes. It associates received routes with the appropriate VPN route tables on the PE (Provider Edge) routers.
* Function of Route-Target Community:
* The route-target community tag ensures that routes are imported into the correct VRF (Virtual Routing and Forwarding) instance, allowing them to be correctly routed within the VPN.
Conclusion:
* Option A:Correct-The route-target community is used to associate received routes with a local VPN route table.
NEW QUESTION # 67
Exhibit.
Referring to the exhibit, which statement Is true?
Answer: D
Explanation:
* Understanding Network Architectures:
* ERB (Edge Routed Bridging) architecture involves routing at the network's edge (leaf nodes), while traffic between leaf nodes is switched. This is commonly used in VXLAN-EVPN setups.
* Analysis of the Exhibit:
* The exhibit shows configurations related to routing instances, VXLAN, and VLANs, with VNIs being used for each VLAN. This setup is characteristic of an ERB architecture where each leaf device handles Layer 3 routing for its connected devices.
Conclusion:
* Option B:Correct-The configuration shown corresponds to an ERB architecture where routing occurs at the network's edge (leaf devices).
NEW QUESTION # 68
You are asked to identify microburst traffic occurring in the network leading lo packet drops in your data center switches Which two tools would be used in this scenario? (Choose two.)
Answer: A,B
Explanation:
* Identifying Microburst Traffic:
* Microbursts are short spikes in network traffic that can overwhelm buffers and cause packet drops. Detecting and analyzing microbursts is crucial for understanding where packet loss might be occurring in a data center network.
* Port Buffer Monitoring:
* Port Buffer Monitoring:This tool specifically tracks the usage of switch buffers, helping to identify when microbursts are causing buffers to overflow, leading to packet drops.
* Port Mirroring:
* Port Mirroring:This tool allows you to monitor real-time traffic on a specific port by copying the traffic to another port where it can be analyzed, often with a packet analyzer. While port mirroring doesn't directly detect microbursts, it helps capture traffic patterns that can indicate microbursts.
Conclusion:
* Option C:Correct-Port buffer monitoring directly identifies buffer overflows caused by microbursts.
* Option A:Correct-Port mirroring allows for the detailed capture and analysis of traffic patterns, which can reveal microburst behavior.
Options B(Traceoptions) andD(Syslog) are less effective in identifying microburst traffic. Traceoptions focus on control plane traffic debugging, and Syslog is more about logging system events than detecting high- frequency traffic spikes.
NEW QUESTION # 69
You are deploying a new network to support your AI workloads on devices that support at least
400 Gbps Ethernet. There is no requirement for any Layer 2 VLANs in this network.
Which network architecture would satisfy this requirement?
Answer: B
Explanation:
For high-performance AI workloads requiring speeds of 400 Gbps or more, a pure Layer 3 IP fabric using EBGP underlay routing is typically deployed for scalability and efficiency. This avoids the complexities of Layer 2 VLANs and minimizes oversubscription.
EBGP-based IP fabrics are common in modern data centers to provide large-scale, scalable, and high-bandwidth connectivity between leaves and spines with VXLAN or other overlays as appropriate but without mandatory Layer 2 VLANs.
EBGP-based IP fabrics typically provide a pure Layer 3 routing underlay that scales easily with high port speeds such as 400Gbps.
NEW QUESTION # 70
Exhibit.
The exhibit shows the truncated output of the show evpn database command.
Given this output, which two statements are correct about the host with MAC address 40:00:dc:01:00:04?
(Choose two.)
Answer: A,C
Explanation:
* Understanding the Output:
* The show evpn database command output shows the MAC address, VLAN, active source, timestamp, and IP address associated with various hosts in the EVPN instance.
* Analysis of the MAC Address:
* Option A:The MAC address 40:00:dc:01:00:04 is associated with the IP address 10.4.4.5, as indicated by the output in the IP address column. This confirms that this host has been assigned the IP 10.4.4.5.
* Option D:The active source for the MAC address 40:00:dc:01:00:04 is listed as 00:02:00:00:00:
04:00:04:00:00:04:00:04, which indicates that the host is connected via an ESI (Ethernet Segment Identifier) LAG (Link Aggregation Group). This setup is typicallyused in multi-homing scenarios to provide redundancy and load balancing across multiple physical links.
Conclusion:
* Option A:Correct-The host with MAC 40:00:dc:01:00:04 is assigned IP 10.4.4.5.
* Option D:Correct-The host is originating from an ESI LAG, as indicated by the active source value.
NEW QUESTION # 71
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