Refer to the exhibit. While configuring router 2 with all the default values, a network engineer cannot see any route received in router 1. How should the engineer solve the issue?

Question

Exhibit

Options

• ASet up a priority different than 0 in the interface.
• BModify the router ID to be the interface IP on the serial.
• CModify the IP address or mask of the interface to a valid one.
• DSet the network type in S1/0 to point-to-point.

• A
  4% (1)
• B
  8% (2)
• C
  84% (21)
• D
  4% (1)

Explanation

This question involves an OSPF adjacency failure on a serial interface. When a network engineer uses all default values, OSPF on a serial link defaults to a point-to-point network type with no DR/BDR election. If the interface has an invalid IP address or subnet mask (e.g., a /32 mask on a point-to-point link when OSPF expects a network prefix, or an IP address in an incorrect subnet), OSPF will fail to form an adjacency and exchange routes. Option A (setting priority ≠ 0) affects DR/BDR election, irrelevant on point-to-point links. Option B (modifying router ID to interface IP) is unnecessary - the router ID doesn't need to match the interface IP. Option D (setting network type to point-to-point) is already the default on serial interfaces, so it wouldn't fix the issue. The root cause is an invalid IP address or mask on the interface, preventing OSPF neighbor discovery and route exchange.

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