You prepared a proposal for a customer that plans to deploy Hyper-V clusters that include network adapters with RoCE support. The customer would like to know why this specific adapter was included…

Question

Options

• ARoCE adapters offer Secure Encryption functionality that can help to secure migration traffic
• BRoCE adapters are the only adapters certified to use in Hyper-V based cluster
• CRoCE adapters can use 100 Gb/s speed for internal virtual machine migrations
• DRoCE adapters will improve performance for live migration and Microsoft SMB Direct

• A
  2% (1)
• B
  12% (5)
• C
  5% (2)
• D
  80% (33)

Explanation

Option D is correct because RoCE (RDMA over Converged Ethernet) enables Remote Direct Memory Access, which allows data to be transferred directly between host memory buffers while bypassing CPU processing. This dramatically reduces latency and CPU overhead during Hyper-V Live Migration (moving running VMs between hosts) and SMB Direct (Microsoft's RDMA-accelerated file transfer protocol used for cluster shared storage), both of which are network-intensive operations that benefit greatly from RDMA capability.

Why the distractors are wrong:

• A is wrong because RoCE is a performance technology, not a security/encryption feature - encryption for migration traffic is configured separately in Hyper-V settings.
• B is wrong because RoCE adapters are not the only certified adapters for Hyper-V clusters; standard NIC adapters are also supported.
• C is a trap - while RoCE hardware can run at 100 Gb/s, standard Ethernet NICs can too; the unique value of RoCE isn't speed, it's RDMA capability.

Memory tip: Think of the acronym chain - RoCE → RDMA → SMB Direct → Live Migration. RoCE is just the transport for RDMA over Ethernet; the exam tests whether you know what RDMA is used for in Hyper-V (SMB Direct + Live Migration), not its raw speed.

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