View Full Cisco CCNP Data Center 300-610 Exam Dumps and Practice Test Dumps.

Question 1. Which technology is commonly used for GPU memory communication across an Ethernet AI fabric

1. STP
2. LACP
3. RoCEv2
4. HSRP

Correct Answer: 3. RoCEv2

Explanation:

RoCEv2 provides Remote Direct Memory Access over a routable Ethernet network and is widely used for high performance AI and machine learning clusters. Cisco describes RoCEv2 as an effective transport for GPUDirect RDMA, which allows GPU memory to communicate across the network with minimal host CPU involvement. AI workloads require very high throughput, low latency, and careful congestion management because distributed training can exchange large amounts of data between GPUs. Cisco includes RoCEv2, RDMA, Ethernet, and InfiniBand among the high performance networking technologies covered by the current 300 610 DCID blueprint.

Question 2. What does RDMA primarily reduce

1. CPU involvement in data transfers
2. Switch port count
3. VLAN capacity
4. Routing table size

Correct Answer: 1. CPU involvement in data transfers

Explanation:

Remote Direct Memory Access allows one system to transfer data directly into the memory of another system with very limited involvement from the operating system and host CPU. This reduces processing overhead and latency, which is valuable for high performance computing and distributed AI workloads. Cisco identifies RDMA as an important technology for modern data center designs because GPU clusters frequently exchange large data sets between nodes. When RDMA is carried over Ethernet using RoCEv2, the network must also provide appropriate congestion management and low loss behavior to maintain predictable application performance.

Question 3. Which component is optimized for massively parallel AI computation

1. DPU
2. SmartNIC
3. Fabric interconnect
4. GPU

Correct Answer: 4. GPU

Explanation:

Graphics Processing Units are well suited to artificial intelligence and machine learning because they can execute very large numbers of mathematical operations in parallel. Deep learning training commonly uses many GPUs working together across a high performance network. The network must therefore provide sufficient bandwidth and low latency so communication between GPUs does not become a bottleneck. Cisco includes GPUs along with DPUs and SmartNICs in the AI hardware portion of the current DCID exam blueprint. Understanding the role of each component helps designers match compute and network architecture to the requirements of training and inference workloads.

Question 4. What is the primary purpose of a DPU in a modern data center server

1. Replace all GPUs
2. Offload infrastructure processing
3. Provide Fibre Channel storage only
4. Act as a leaf switch

Correct Answer: 2. Offload infrastructure processing

Explanation:

A Data Processing Unit is designed to offload infrastructure functions from the host CPU. Depending on the architecture, these functions can include networking, security, storage processing, telemetry, and virtualization related tasks. Offloading such work allows the primary CPU and GPU resources to focus more heavily on application processing. Cisco includes DPUs and SmartNICs in the hardware component section of the current 300 610 DCID blueprint because they are increasingly important in AI ready data center infrastructure. Designers should consider how much infrastructure processing should remain on the host and how much can be delegated to specialized devices.

Question 5. Which AI phase usually performs repeated model optimization using large data sets

1. Training
2. Inference
3. Routing
4. Archiving

Correct Answer: 1. Training

Explanation:

Training is the phase in which an artificial intelligence model learns from data by repeatedly adjusting internal parameters to reduce error. Large training jobs can require many GPUs operating together and exchanging large amounts of information across the network. This creates demanding east west traffic patterns and makes throughput, latency, congestion handling, and network reliability important design considerations. Inference uses an already trained model to process new inputs and produce results. Cisco explicitly includes the distinction between training and inference in the AI and machine learning concepts section of the current 300 610 DCID blueprint.

Question 6. What is a major network requirement for distributed AI training

1. Low switch port density
2. Large broadcast domains
3. High bandwidth and low latency
4. Slow convergence

Correct Answer: 3. High bandwidth and low latency

Explanation:

Distributed AI training requires high bandwidth and low latency because many compute nodes exchange model information repeatedly during training. If the network cannot move this data quickly, expensive GPU resources can remain idle while waiting for communication to complete. Cisco describes AI clusters as requiring very high throughput and low latency, especially when RoCEv2 and GPUDirect RDMA are used. Designers must also consider congestion and packet loss because these can significantly reduce application performance. The current DCID blueprint therefore includes AI network requirements as a major part of network design knowledge.

Question 7. Which feature can pause selected Ethernet traffic during congestion

1. ECN
2. PFC
3. VRF Lite
4. LACP

Correct Answer: 2. PFC

Explanation:

Priority Flow Control can pause selected Ethernet priority classes when congestion threatens to cause packet loss. This capability is useful in lossless Ethernet designs such as those supporting RoCEv2 traffic. Unlike traditional pause mechanisms that can stop all traffic on a link, PFC operates on selected priorities so other traffic classes can continue. Cisco emphasizes that AI clusters using RoCEv2 need careful lossless network behavior and that Nexus platforms provide both PFC and ECN capabilities. PFC should still be engineered carefully because excessive pause behavior can propagate congestion and negatively affect the wider network.

Question 8. What does ECN communicate to an end host

1. VLAN membership
2. MAC address changes
3. Link aggregation state
4. Network congestion

Correct Answer: 4. Network congestion

Explanation:

Explicit Congestion Notification marks packets when congestion is detected instead of immediately dropping them. The receiver can then return congestion information to the sender, allowing the sender to reduce its transmission rate. Cisco describes ECN as an important congestion management mechanism in RoCEv2 based AI networks. It provides end to end feedback and works with transport behavior to reduce the likelihood that congestion results in packet loss. Designers of high performance Ethernet fabrics often combine ECN with appropriate queueing and PFC policies so traffic can remain low loss while avoiding unnecessary network wide pauses.

Question 9. What is the main purpose of a vPC

1. Provide storage zoning
2. Replace all routing protocols
3. Allow one device to form a port channel to two switches
4. Encrypt Ethernet traffic

Correct Answer: 3. Allow one device to form a port channel to two switches

Explanation:

A virtual Port Channel allows a downstream device to build one logical port channel using physical links connected to two separate Cisco Nexus peer switches. This provides link redundancy and allows both paths to forward traffic instead of relying on a blocked standby path. The downstream device sees the vPC peers as one logical port channel partner for the connected links. Cisco includes vPC and LACP among the Layer 2 connectivity technologies in the DCID blueprint because they are fundamental design tools for high availability and efficient link utilization in data centers.

Question 10. What is the main function of the vPC peer keepalive link

1. Monitor peer switch availability
2. Carry all user traffic
3. Synchronize MAC tables continuously
4. Transport storage frames

Correct Answer: 1. Monitor peer switch availability

Explanation:

The vPC peer keepalive link sends periodic messages between the two vPC peer switches so each device can determine whether the other peer remains operational. Cisco states that this link does not normally carry user data or state synchronization traffic. Its primary role is failure detection, particularly when the vPC peer link itself becomes unavailable. The keepalive path helps the switches distinguish a peer link failure from a complete peer switch failure and prevents dangerous dual active forwarding conditions. Cisco recommends using a separate Layer 3 path or management VRF for the keepalive connection.

Question 11. What is the primary purpose of the vPC peer link

1. Provide DHCP services
2. Perform load balancing
3. Replace the keepalive path
4. Synchronize vPC peer state

Correct Answer: 4. Synchronize vPC peer state

Explanation:

The vPC peer link synchronizes important control information between the two peer switches. Cisco identifies information such as vPC state, consistency parameters, and MAC address information as examples of data synchronized across the peer link. The peer link can also carry data traffic in specific failure scenarios when the local vPC member path is unavailable. Cisco recommends using redundant physical links for the peer link so the failure of one physical interface does not disrupt the entire vPC domain. The peer link and peer keepalive link therefore serve different but complementary high availability functions.

Question 12. How many switches form a traditional vPC peer pair

1. One
2. Two
3. Three
4. Four

Correct Answer: 2. Two

Explanation:

A traditional vPC domain is formed by two Cisco Nexus switches acting as vPC peers. The pair uses a vPC peer link for state synchronization and a peer keepalive path for peer availability detection. Downstream devices can then form port channels with links distributed across both Nexus switches. This allows both switches to actively forward traffic while protecting against the failure of one physical switch or uplink path. Cisco documentation specifically states that only two switches participate as peers in a traditional vPC pair, making the architecture straightforward and deterministic for redundancy design.

Question 13. What does VRF Lite provide

1. Separate routing tables on one device
2. Fibre Channel zoning
3. GPU acceleration
4. Ethernet pause control

Correct Answer: 1. Separate routing tables on one device

Explanation:

VRF Lite allows one physical routing device to maintain multiple independent routing tables. This provides Layer 3 traffic separation without requiring completely separate physical routers for each routing domain. In data center designs, VRF Lite can be used to maintain tenant or application separation and can also connect VXLAN EVPN fabrics to external Layer 3 networks. Cisco includes routing virtualization with VRF Lite in the current 300 610 blueprint because segmentation and external connectivity are fundamental considerations when designing modern data center networks.

Question 14. Where is VRF Lite commonly used in a VXLAN EVPN fabric

1. Only between servers
2. Only inside GPUs
3. Only on storage arrays
4. Between the fabric and an external Layer 3 network

Correct Answer: 4. Between the fabric and an external Layer 3 network

Explanation:

Cisco describes VRF Lite as a method for connecting a VXLAN EVPN fabric to an external Layer 3 domain. This external domain can include edge routers, border routers, WAN infrastructure, or other networks outside the data center fabric. Separate VRF instances preserve routing isolation while routes are exchanged between the fabric border and external devices. This is particularly useful for north south connectivity where tenants or applications must remain separated even as their traffic leaves the VXLAN fabric. Cisco Nexus Dashboard Fabric Controller can automate VRF Lite connectivity for supported border roles.

Question 15. What does VXLAN primarily provide

1. Fibre Channel encryption
2. Layer 2 overlay segments across a Layer 3 network
3. Physical link aggregation
4. GPU memory access

Correct Answer: 2. Layer 2 overlay segments across a Layer 3 network

Explanation:

VXLAN creates logical Layer 2 segments over an underlying Layer 3 IP network. This allows data center endpoints to participate in the same logical segment even when the physical network between their attachment points is routed. VXLAN uses a much larger network identifier space than traditional VLANs and is therefore well suited to large multitenant environments. In modern Cisco data center fabrics, VXLAN is commonly paired with EVPN so endpoint reachability can be distributed through a control plane rather than depending heavily on flood and learn behavior. Cisco includes VXLAN EVPN concepts throughout current data center design training.

Question 16. What control plane is commonly paired with VXLAN in Cisco data center fabrics

1. STP
2. HSRP
3. BGP EVPN
4. LACP

Correct Answer: 3. BGP EVPN

Explanation:

BGP EVPN provides the control plane commonly used with VXLAN in modern Cisco data center fabrics. EVPN distributes IP and MAC reachability information among fabric nodes so endpoints can be located without depending entirely on traditional flooding and learning. Cisco Nexus Dashboard Fabric Controller documentation describes VXLAN EVPN fabrics as distributing IP and MAC reachability information throughout the fabric. This architecture improves scalability and supports advanced multitenant segmentation. The routed underlay provides IP transport, while VXLAN supplies the overlay encapsulation and BGP EVPN distributes endpoint reachability and related control information.

Question 17. What does LACP negotiate

1. Storage zoning
2. VXLAN identifiers
3. GPU allocation
4. Link aggregation

Correct Answer: 4. Link aggregation

Explanation:

Link Aggregation Control Protocol dynamically negotiates the formation and operation of Ethernet link aggregation groups. Several physical interfaces can operate together as one logical port channel, providing additional bandwidth and redundancy. LACP also helps detect whether connected interfaces are compatible members of the same aggregation. In data center design, LACP is frequently used with server connections, switch uplinks, and vPC architectures. Cisco explicitly includes vPC and LACP under Layer 2 connectivity evaluation in the current 300 610 DCID blueprint because resilient port channel design is central to data center availability.

Question 18. What is the main advantage of Equal Cost Multipath routing in a leaf spine fabric

1. Use multiple equal cost paths
2. Disable routing redundancy
3. Create Fibre Channel zones
4. Reduce the number of uplinks to one

Correct Answer: 1. Use multiple equal cost paths

Explanation:

Equal Cost Multipath routing allows a device to install and use several routes that have the same routing cost toward a destination. In a leaf spine data center fabric, leaf switches normally have multiple equal cost paths through different spine switches. ECMP allows these parallel links to carry traffic simultaneously instead of keeping most paths idle. This improves bandwidth utilization, provides resilience when one path fails, and contributes to predictable horizontal scaling. Although the current DCID blueprint describes the broader Layer 3 connectivity and convergence objectives, ECMP is a fundamental design principle behind modern routed leaf spine fabrics.

Question 19. Which traffic pattern is especially important in distributed AI training

1. North south traffic only
2. Broadcast traffic only
3. East west traffic between compute nodes
4. Management traffic only

Correct Answer: 3. East west traffic between compute nodes

Explanation:

Distributed AI training generates substantial east west traffic because GPUs and compute nodes repeatedly exchange model parameters and intermediate results. This communication can be extremely bandwidth intensive and sensitive to latency. If the data center network cannot move information quickly between compute nodes, expensive GPU resources may remain idle while waiting for synchronization. Cisco therefore emphasizes high throughput, low latency, loss management, and scalable network architecture when designing AI ready data centers. The current 300 610 blueprint specifically includes AI workload network requirements and high performance transport technologies such as RoCEv2 and RDMA.

Question 20. Which technology is designed to notify RoCEv2 senders about congestion before packet loss becomes severe

1. STP
2. ECN
3. LACP
4. VRF Lite

Correct Answer: 2. ECN

Explanation:

Explicit Congestion Notification provides end to end congestion feedback for RoCEv2 traffic. When a network device experiences congestion, it can mark packets using ECN bits rather than immediately dropping them. The receiving endpoint detects the congestion indication and generates a congestion notification toward the sender. The sender can then reduce its transmission rate for the affected flow. Cisco describes ECN as an efficient congestion management mechanism for AI and machine learning fabrics using RoCEv2. It works alongside lossless Ethernet techniques such as PFC to reduce packet loss while avoiding uncontrolled congestion in high performance data center networks.