1. Transport Layer Tasks: -tracks conversations -manages data for many applications -segments data -multiplexes applications

2. numbering and sequencing -tracks conversations -manages data for many applications -segmentaion -multiplexing

3. Voice: Daten: vollständig  schnell, < 80ms delay dafür ist TCP geeignet dafür ist UDP geeignet

4. 64-20 bis 1500-20 Byte

5. TCP Ports UDP Ports Internet Assigned Numbers Authority (IANA)

6. Port Adressing: -identifies the communicating applications -enables a receiving host to forward the data to the appropriate application -identifies multiple conversations between the hosts

7. Anmerkung: Microosoft Windows verwendet für Webbrowser Ports im Bereich 1024 bis etwa 5000. (Diese „RPC dynamic port allocation“ Einstellungen können geändert werden.)

8. TCP Connection Termination: netstat –n zeigt als State: TIME_WAIT TCP is connection-oriented ! TCP Connection Establishment: Data Transfer: 3-Way Handshake: initializes the sequence numbers for the session.

9. The 3-Way Handshake initializes the sequence numbers for the session.

14. packets will be delivered and reassembled at the destination SourceDestination

15. Flow Control with Window Size = 10

16. Only the data in the segments that complete the stream are acknowledged.

17. Timeout: A host transmits segments and starts a timer. If the acknowledgment is not received before the timer expires, the segments are retransmitted. timeout and resend the data that needs to be acknowledged

19. Flow Control: to prevent the receiver from being overwhelmed by incoming data,  provided by window size

20.  connectionless low overhead: