300-640 Latest Exam Guide | Regualer 300-640 Update

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Cisco 300-640 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: AI Infrastructure Deployment	25%	- GPU Server Configuration - Network Switch Configuration - Hardware Installation and Configuration - Cabling and Connectivity - Storage Configuration for AI
Topic 2: AI Infrastructure Security and Compliance	10%	- Compliance Considerations - Access Control and Authentication - Security Best Practices
Topic 3: AI Infrastructure Operations	20%	- Troubleshooting Common Issues - Monitoring and Management Tools - Performance Optimization - Capacity Planning
Topic 4: AI Infrastructure Fundamentals	15%	- GPU Architecture and Types - AI Infrastructure Requirements - AI Workload Characteristics - AI Ecosystem Components
Topic 5: Cisco AI Infrastructure Architecture	30%	- Hyperconverged Infrastructure for AI - Cisco UCS AI Infrastructure Solutions - Network Architecture for AI Workloads - Storage Architecture Considerations

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Cisco Implementing Cisco Data Center AI Infrastructure Sample Questions (Q45-Q50):

NEW QUESTION # 45
An engineer must optimize the performance of an AI inference workload running on a Cisco UCS C-Series rack server. The workload experiences intermittent latency spikes, and Intersight system logs show frequent thermal event entries. Which troubleshooting action must be taken first to address the performance issues on the Cisco UCS server?

A. Inspect the physical environment of the server, including ambient temperature and airflow, and replace any failed fans.
B. Review the resource utilization of the AI workload (CPU, memory, and GPU) to identify potential bottlenecks and optimize resource allocation.
C. Check the power supply status and power consumption of the UCS server using UCS Manager to ensure that the server has sufficient power.
D. Examine the storage configuration, including the RAID configuration and disk health, to ensure that the storage subsystem is not causing latency issues.

Answer: A

Explanation:
Frequent thermal events indicate that the server may be throttling CPU or GPU performance to protect hardware from overheating. The first action is to verify the physical cooling conditions, including ambient temperature, airflow, and fan health, because resolving thermal constraints directly addresses the likely cause of intermittent latency spikes.

NEW QUESTION # 46
A network engineer analyzes RoCEv2 traffic flows in an AI training cluster and notices that all RoCEv2 packets have the Don't Fragment bit set in the IP header. Why must RoCEv2 set the DF bit in all packets?

A. to prevent IP fragmentation that would break the InfiniBand sequence numbering and ordering guarantees
B. to enable Path MTU Discovery so that the optimal packet size can be negotiated
C. to ensure that packets always take the same path through ECMP routing for consistent latency
D. to indicate to intermediate switches that the packet contains RDMA traffic requiring special handling

Answer: A

Explanation:
RoCEv2 carries InfiniBand transport semantics over UDP/IP, and IP fragmentation would disrupt the expected packet sequencing and ordering behavior required by RDMA. Setting the Don't Fragment bit prevents intermediate devices from fragmenting RoCEv2 packets, preserving reliable RDMA transport behavior across the AI training fabric.

NEW QUESTION # 47
An administrator configures VXLAN EVPN in a Cisco AI data center fabric. The requirement is to provide Layer 2 adjacency across multiple leaf switches while maintaining scalable control-plane learning. Which protocol fulfills this function?

A. HSRP
B. OSPF
C. STP
D. BGP EVPN

Answer: D

Explanation:
BGP EVPN provides scalable control-plane MAC and IP route advertisement for VXLAN fabrics.
It eliminates excessive flooding associated with traditional Layer 2 networks and supports efficient multi-tenant AI infrastructures. STP only prevents loops, OSPF is a Layer 3 routing protocol, and HSRP provides gateway redundancy rather than overlay endpoint learning.

NEW QUESTION # 48
A network engineer logs into Nexus Dashboard and sees an anomaly showing that a BGP peer connection has gone down. Next to the anomaly, a yellow bubble displays "Correlated." What does Nexus Dashboard indicate by "Correlated" in this case?

A. It indicates that the Nexus Dashboard has correlated this anomaly to activity by specific user account.
B. It indicates that the Nexus Dashboard has seen this anomaly across more than one device in the fabric.
C. It indicates that this anomaly is a result of a higher-level root anomaly.
D. It indicates that the Nexus Dashboard has correlated the scope of the impact.

Answer: C

Explanation:
In Nexus Dashboard, a correlated anomaly means the displayed issue is associated with a higher-level root anomaly. The BGP peer-down event is being treated as a resulting or related symptom rather than the primary root cause, helping operators focus troubleshooting on the upstream issue first.

NEW QUESTION # 49
An engineer deploys an AI fabric on Cisco Nexus 9000 Series Switches connected to Cisco UCS nodes with NVIDIA GPUs. The requirements call for optimal network performance for training workloads. Adaptive routing is enabled on the NICs, and per-packet load balancing is enabled on the switches. Which other configuration must be implemented for this integration to be fully operational?

A. Set the cisco_dlb=1 option in the NIC configuration so the NIC knows it can use adaptive routing.
B. Add the "adaptive-routing" keyword under the switch load balancing configuration.
C. Include switch configuration "hardware profile spectrum-x" in global configuration mode.
D. Include matching statements in your QoS policy so the switch knows which incoming packets to load balance.

Answer: A

Explanation:
The NIC must be explicitly configured with the Cisco dynamic load-balancing setting so it recognizes that the connected Cisco Nexus fabric supports adaptive routing. This completes the integration between NIC-side adaptive routing and switch-side per-packet load balancing for optimized AI training traffic.

NEW QUESTION # 50
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