Routers R1 and R2 establish an OSPF neighbor relationship. When R1 receives an LSU message from R2, which of the following methods will it use to inform R2 that it has received the LSU?

Question

Options

• AR1 will respond to R2 with a DD message, in which the sequence number of the LSA header is the same as that of the LSU
• BR1 will respond with LSAck message to R2
• CR1 will transmit the TCP packet with the ACK bit set to 1 to R2
• DR1 will return the LSU with the same serial number to R2

• A
  12% (6)
• B
  78% (40)
• C
  4% (2)
• D
  6% (3)

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