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Cisco 300-640 Exam Syllabus Topics:

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

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Cisco Implementing Cisco Data Center AI Infrastructure 認定 300-640 試験問題 (Q37-Q42):

質問 # 37
A network engineer is deploying an AI training fabric using Cisco Nexus switches with RoCEv2 enabled. During testing, packet drops occur when traffic bursts exceed buffer capacity. Which feature should be configured to minimize congestion and improve lossless Ethernet performance for GPU traffic?

A. DHCP Snooping
B. BPDU Guard
C. Priority Flow Control
D. Storm Control

正解：C

解説：
Priority Flow Control (PFC) allows selective pausing of traffic classes during congestion, which is critical for RoCEv2 environments carrying GPU-to-GPU communication. AI workloads are highly sensitive to packet loss and retransmissions. BPDU Guard and DHCP Snooping are security features, while Storm Control only limits broadcast or multicast traffic and does not create lossless behavior for RDMA traffic.

質問 # 38
Drag and Drop Question
A network engineer is designing congestion management for an AI cluster using RoCEv2 transport. Based on Cisco best practices, the engineer must understand how ECN and PFC work together to provide lossless Ethernet transport. Drag and drop the congestion management mechanisms from the left onto the corresponding descriptions on the right. Not all options are used.

正解：

解説：

質問 # 39
An organization deploys a new AI training fabric that uses RoCEv2 for GPU communication. The network architect designs the QoS configuration to ensure reliable RDMA transport and must meet these requirements:
- Support 256 GPU servers with RDMA connectivity.
- Prevent any packet loss that causes RDMA connection failures.
- Maintain consistent low-latency communication with a target of less
than 10 microseconds.
- Use industry-standard protocols and configurations.
Which configuration ensures that RoCEv2 operates as a lossless transport?

A. Implement traffic shaping to smooth RDMA traffic bursts and prevent congestion.
B. Set the RDMA traffic to use the highest DSCP value to ensure priority forwarding.
C. Configure weighted fair queuing to prioritize RDMA traffic over other traffic classes.
D. Enable Priority Flow Control on the traffic class carrying RoCEv2 packets.

正解：D

解説：
RoCEv2 requires lossless Ethernet behavior to prevent packet drops that can disrupt RDMA communication. Enabling Priority Flow Control on the traffic class carrying RoCEv2 packets allows Ethernet pause behavior for that priority, helping maintain reliable, low-latency RDMA transport across the AI training fabric.

質問 # 40
Which function is provided through natural language processing?

A. annotation of data transmission protocols for device authorization
B. compression of large configuration files for storage efficiency
C. automated conversion of spoken or written content into structured data
D. filtration of duplicate entries from transaction records

正解：C

解説：
Natural language processing enables systems to interpret, process, and transform human language from spoken or written inputs into structured data that applications can analyze, search, classify, or use for automation.

質問 # 41
An engineer made changes to the corporate DNS, which caused a Cisco UCS X-Series domain to lose connectivity to Intersight. To restore connectivity, the management interface DNS and NTP settings must be updated using the device console UI. Which configuration change must be made in Intersight to allow the updated DNS configuration to persist?

A. Create a device connector policy and apply it to the blade chassis.
B. Create a network connectivity policy and apply it to the blade chassis.
C. Edit the IMC access policy associated to the fabric interconnects.
D. Edit the domain profile deployed to the fabric interconnect.

正解：D

解説：
In Cisco Intersight Managed Mode, the fabric interconnect management DNS and NTP settings are controlled through the UCS domain profile. If the settings are changed locally from the device console UI, the deployed domain profile must also be updated in Intersight so the corrected configuration is not overwritten during the next policy deployment or compliance remediation.

質問 # 42
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