On the OSPF network shown in the figure, area 1 is a stub area, area 2 is a totally stub area, and area 3 is an NSSA. By default, which of the following routers does not have default routes in its routing table?
Area 1 = Stub➤ Default route is injected by ABR (R2) — ✅ R6 will get a default route.
Area 2 = Totally Stub➤ Default route injected automatically by ABR (R3) — ✅ R4 will get one.
Area 3 = NSSA➤ By default, no default route is injected unless default-information-originate is explicitly configured on the ABR (R1).
???? Therefore:
R5, located in Area 3 (NSSA), will not receive a default route by default.
✅ Final Answer: D. R5
Official Huawei Extract:
" In NSSA areas, default routes are not injected automatically. To provide a default route in NSSA, the ABR must be configured with default-route-advertise or default-information-originate. Stub and totally stub areas receive default routes by default. "
— [Huawei HCIA-Datacom Certification Guide – OSPF Area Types and Route Injection]
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