Which of the following descriptions of virtual systems and VPN instances are correct? (Multiple choice)

Question

Options

• AVPN instances can support multicast protocols
• BAdministrator uses IP
• CWhen creating a virtual system, a VPN instance with the same name will be automatically
• DBoth virtual systems and VPN instances can achieve business isolation and routing isolation.

• A
  19% (9)
• B
  81% (39)

Explanation

Options B, C, and D are correct because they accurately reflect how virtual systems (VS) and VPN instances behave in network virtualization implementations (notably Huawei). Option B is correct because administrators manage virtual systems using IP addresses as the access method. Option C is correct because creating a virtual system automatically generates a corresponding VPN instance sharing the same name - this is a built-in platform behavior that links the two constructs. Option D is correct because both technologies achieve business isolation (separating traffic/services between tenants) and routing isolation (maintaining independent routing tables), just at different scopes: VPN instances isolate routing tables within a single device, while virtual systems virtualize the entire device management plane.

Option A is wrong because VPN instances (VRFs) are designed for unicast routing isolation and do not natively support multicast protocols - multicast requires separate mechanisms and is a key limitation that distinguishes VPN instances from full virtual systems.

Memory tip: Think of it as a parent-child relationship - creating a Virtual System (parent) automatically births a VPN instance (child) with the same name. Both isolate, but only the parent (VS) gets the full feature set including multicast support.

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