Refer to the exhibit. Which IPv6 OSPF network type is applied to interface Fa0/0 of R2 by default?

Question

Exhibits

Options

• Abroadcast
• BEthernet
• Cmultipoint
• Dpoint-to-point

• A
  89% (24)
• B
  4% (1)
• D
  7% (2)

Explanation

Broadcast is the default IPv6 OSPF (OSPFv3) network type automatically assigned to Ethernet interfaces like FastEthernet (Fa0/0). Ethernet is a multi-access technology that supports multiple devices on the same segment, so OSPF recognizes this and applies the broadcast network type by default, which triggers a DR/BDR election process.

Why the distractors are wrong:

• B (Ethernet) – "Ethernet" is not a valid OSPF network type; it describes the physical interface technology, not the OSPF classification.
• C (Multipoint) – This is associated with non-broadcast multi-access (NBMA) environments like Frame Relay configured as multipoint, not Ethernet.
• D (Point-to-point) – This type is applied to serial links or explicitly configured tunnel interfaces, where only two routers communicate directly; it does not apply to Ethernet by default.

Memory Tip: Think "Broadcast = Ethernet's BFF" - any time you see a standard Ethernet interface (Fa, Gi, etc.) in OSPF, the default network type is broadcast, because Ethernet inherently supports broadcasting to multiple devices. If the question mentions a serial or tunnel link, then think point-to-point.

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