Data replication service DRS provides multiple functions such as real-time migration, backup migration, real-time synchronization, data subscription and real-time disaster recovery, among which…

Question

Options

• APublic network
• BVPN network
• CVPC network
• DOverlay network

• A
  4% (1)
• B
  16% (4)
• C
  8% (2)
• D
  72% (18)

Explanation

Option D is correct because Overlay network is not a supported network migration method in DRS for real-time (live) migration. The three supported network types for live migration are Public network, VPN network, and Direct Connect/VPC network, making options A, B, and C incorrect as distractors - all three are valid, documented migration paths in DRS. Public network uses the internet for connectivity, VPN network establishes an encrypted tunnel between on-premises and cloud environments, and VPC network enables migration within or between Huawei Cloud VPCs through private connectivity. Overlay network is a virtualization technology used for network abstraction (such as in SDN environments) but is not listed as a DRS migration network type.

Memory tip: Think of the three supported methods as covering the main connectivity tiers - public internet, encrypted tunnel, and private cloud network. Overlay is a networking layer concept, not a migration transport, so it stands out as the odd one out.

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