Which of the following option packets belong to OSPF protocol packets? (Multiple choice)

Question

Options

• AHello
• BLSU
• CLSA
• DLSR

• A
  83% (25)
• C
  17% (5)

Explanation

OSPF defines five packet types: Hello, DBD (Database Description), LSR (Link State Request), LSU (Link State Update), and LSAck (Link State Acknowledgment). Options A (Hello), B (LSU), and D (LSR) are all genuine OSPF packet types - Hello packets discover and maintain neighbor relationships, LSR packets request specific link-state information from neighbors, and LSU packets deliver that information in response.

Option C (LSA) is the distractor: an LSA (Link State Advertisement) is not a packet type - it is the data payload carried inside an LSU packet. Think of LSU as the envelope and LSA as the letter inside; only the envelope is a "packet."

Memory tip: Recite the five OSPF packet types as "Hello, DBD, LSR, LSU, LSAck" - if you notice LSA is absent from that list, you'll immediately flag it as the trick answer whenever it appears alongside real packet types.

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