In Huawei IPS equipment, which of the following are the working modes of the physical interface? (Multiple choice)

Question

Options

• AExchange
• BInterface pair
• CRouting
• DBypass detection

• A
  84% (43)
• B
  16% (8)

Explanation

Huawei IPS physical interfaces support three distinct working modes: Exchange (switching/Layer 2), Routing (Layer 3), and Bypass detection (out-of-band/tap). In Exchange mode, the device transparently forwards traffic inline at Layer 2 without needing IP addresses on the interface. In Routing mode, the interface is assigned an IP address and operates at Layer 3, making forwarding decisions based on routing tables. Bypass detection (tap) mode receives a mirrored copy of traffic - the IPS inspects it passively without being in the forwarding path, meaning it cannot block threats but also cannot disrupt traffic flow.

Why B is wrong: "Interface pair" is not a working mode - it is a configuration object that groups two physical interfaces (e.g., one inbound, one outbound) to form an inline inspection path. You configure an interface pair using interfaces already set to Exchange or Routing mode; the pair itself describes topology, not interface behavior.

Memory tip: Think of the three modes by their inspection posture - Exchange (inline Layer 2), Routing (inline Layer 3), Bypass (out-of-band copy). Interface pair is the container you build with those modes, not a mode itself - "pair" describes relationship, not behavior.

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