Review/ Homework. Unanswered Review What does a port number identify? (Select all that apply) Multiple answers: You can select more than one option O A The protocol used at the data link layer 0 B The protocol used at the network layer C The protocol used at the transport layer O D The protocol used at the application layer Unanswered Submit Review 8 Homework. Unanswered If the sequence number of the last correctly received TCP segment is 272 and its length is 28 bytes, the Ack number sent for this segment will be: (Enter only a number) Numeric Answer: Unanswered Submit