Which two statements are true about TCP communication? (Choose two.)
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A. B. C. D.AC
TCP (Transmission Control Protocol) is one of the primary protocols in the Internet Protocol Suite that provides reliable, ordered, and error-checked delivery of data between applications running on hosts communicating through an IP network.
Here are the two true statements about TCP communication:
The sender adds sequencing numbers to the packets it sends: TCP sends a stream of bytes as a sequence of segments. Each segment consists of a header and a data section. The header includes various fields, including a sequence number, that helps the receiver to reconstruct the original data stream. The sender assigns a unique sequence number to each segment sent. These sequence numbers help the receiver to reassemble the data in the correct order.
The receiver acknowledges the final packet in each communication stream: The receiver acknowledges the receipt of TCP packets by sending an acknowledgment packet back to the sender. This acknowledgment packet contains a sequence number that acknowledges the receipt of all packets up to that number. The receiver sends an acknowledgment packet only after receiving a packet from the sender. The receiver does not acknowledge each packet, but it acknowledges the final packet in each communication stream. The sender retransmits any packet that does not receive an acknowledgment from the receiver.
Option B is incorrect because the receiver does not add sequencing numbers to the packets received. The receiver only acknowledges the receipt of the packets.
Option D is incorrect because the receiver does not acknowledge each packet it receives from the sending device, but only the final packet in each communication stream.
Therefore, the correct answers are A and C.