When the administrator views the RIB table of the device, the OSPF external route should be marked (___) in the Protocol field.

Question

Options

• AO_ASE
• B
• C
• D

• A
  78% (29)
• B
  11% (4)
• C
  3% (1)
• D
  8% (3)

Explanation

Option A, O_ASE, is correct because OSPF external routes - those redistributed into OSPF from other routing protocols or external autonomous systems - are classified as AS External (ASE) routes and are marked with the protocol identifier O_ASE in the RIB table on Huawei VRP devices. The other choices (B, C, D) are not provided in this question, so they cannot be evaluated individually, but common distractors in similar questions include O (used for intra-area OSPF routes), O_IA (used for inter-area OSPF routes), and O_NSSA (used for routes learned through a Not-So-Stubby Area). Confusing these markers is a frequent mistake, as each reflects a different OSPF route origin.

Memory tip: ASE stands for "Autonomous System External" - if the route came from outside the OSPF autonomous system, it is an ASE route, so the marker is O_ASE.

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