NetApp rack unit (U) sizing is defined per shelf model:

DS2246 = 2U each → 2 × 2U = 4U

DS4243 = 4U each → 3 × 4U = 12U

DS4486 = 4U → 4U

Total:4U + 12U + 4U = 20U

Therefore, the correct answer is20U.

Using ports from different NICs protects against single NIC failure, while using the same chipset ensures consistent performance characteristics. This combination maximizes resiliency and performance.

The cluster ping-cluster command is specifically designed to testinter-node cluster network connectivity, includinglatency, packet loss, and throughputbetween cluster nodes. This command generates synthetic traffic over the cluster interconnect and measures performance characteristics that directly affect cluster health and stability.

The command is commonly used duringpost-installation validation, cluster expansion, and troubleshooting scenarios involving cluster network performance. It provides insight into whether the cluster interconnect is operating within expected parameters.

Other commands listed do not provide this functionality. QoS workload statistics focus on application-level performance, network test-path validates reachability for LIF failover paths, and statistics node show reports internal node counters rather than inter-node network performance.

Therefore, the correct answer isB.

Service Event Reports require standardized installation and configuration data.NetAppDocsgenerates structured output reports specifically designed for SER creation, including hardware, cabling, and configuration details. Other tools do not produce SER-formatted documentation.

NetApp installation rules prohibit mixingNSE and non-NSE drives within the same stack. While the AFF A300 supports both encrypted and non-encrypted drives, they must be physically separated into different stacks.

Licensing NSE alone does not allow mixing encrypted and unencrypted drives in the same stack. The correct approach is tocreate a new stackspecifically for the NSE drives.

Therefore, the correct answer isB.

The Cluster Switch Health Monitor (CSHM) is a diagnostic feature used to monitor the health and configuration of cluster network switches. As part of ONTAP SAN implementation testing and troubleshooting, CSHM relies on secure, authenticated communication between the cluster and the switches.

NetApp installation and operational documentation clearly specifies thatSSHmust be used for bothCSHM monitoring and log collection. SSH provides encrypted communication, authentication, and command execution capabilities that are required to securely access switch operating systems and retrieve diagnostic information.

Protocols such asTelnetandHTTPare not acceptable because they transmit data in clear text and do not meet NetApp security standards.SSLis not used for switch CLI access or log retrieval in the context of CSHM.

Using SSH ensures compliance with security best practices while enabling ONTAP to collect switch logs, execute health checks, and validate switch configuration state. This requirement is consistently reinforced in NetApp installation objectives as part of secure cluster infrastructure design.

Therefore, the correct answer isD (SSH).

Secure multitenancy in ONTAP requires complete separation of network traffic, routing tables, and IP addressing.IPspacesprovide this level of isolation by creating independent network stacks within a single ONTAP cluster.

Failover groups, VLANs, and broadcast domains organize network paths but do not isolate routing domains. Only IPspaces ensure tenants cannot access each other’s network traffic.

Thus,IPspacesenable secure multitenancy.