Iam learning to CCNA exam (648-801) from TestKing
Below is question, and i consider that a right answer is B but TestKing suppose that is a C, what do You think about that ?
The corporate head office of TestKing has a teleconferencing system that uses a VOIP (voice over IP) system that uses UDP datagrams to send and receive voice data. If for whatever reason the network connection is compromised, what would happen if the datagrams would arrive to their destination out of sequence?
A. UDP will send an ICMP Information Request to the source host.
B. UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
C. UDP will drop the datagrams.
D. UDP will use the sequence numbers in the datagram headers to reassemble the data in the correct order.
E. UDP will not acknowledge the datagrams and wait for a retransmission of the datagrams.
In my opinion UDP doesnt know that received a segment out of sequence, because UDP segments hasn't any field in header with sequence number or something similary, so UDP pass this segment to upper layers and them should have a detecet error mechanism.