1. TRANSPORT LAYER UDP TCP

8. Nomor Port

10. Alokasi nomor port

12. Socket Address

17. Format datagram UDP yang dilengkapi pseudo-header

19. UDP encapsulation & decapsulation

20. Transmission Control Protocol (TCP)

24. Events At Sender Site Network Messages Events At Receiver Site Send Packet 1 Receive ACK 1 Send Packet 2 Receive ACK 2 Receive Packet 1 Send ACK 1 Receive Packet 2 Send ACK 2

26. Send Packet 1 Start Timer Retransmit Packet 1 Start Timer Receive ACK 1 Cancel Timer Receive Packet 1 Send ACK 1 Packet should arrive ACK should be sent ACK would normally arrive at this time Timer Expires Packet lost Events At Sender Site Network Messages Events At Receiver Site

29. Tiga macam kondisi paket dalam protokol sliding window Successfully Transmitted ( received and acknowledged ) Being Transmitted Not Yet Transmitted

30. Events At Sender Site Network Messages Events At Receiver Site Send Packet 1 Receive ACK 1 Receive ACK 2 Receive Packet 1 Send ACK 1 Receive Packet 2 Send ACK 2 Send Packet 2 Send Packet 3 Receive ACK 3 Receive Packet 3 Send ACK 3

33. Sliding window with pointer

34. Window management

35. Corrupted segments

36. Lost segment

37. Lost acknowledgment

42. Pointers Sent and ACKed Sent & Not Yet ACKed To be Sent Not Yet Generated ( waiting for window slide )

44. Format segmen TCP Details later……