aufgabe 2

Gegeben §

Kommunikation §

• A$\to$(Bytes 0-358)$\to$B
• A$\to$(Segment 1 50B)$\to$B
• A$\to$(Segment 2 80B)$\to$B

Hosts §

	Type	Port
A	src	1028
B	dst	80

Segmente §

	Größe	Byte-Nr
1	50B	359
2	80B	?

Sequenzdiagramm §

sequenceDiagram
    participant A AS A<br/>Port 1028
    participant B AS B<br/>Port 80

    A-->>B: syn, seq=x
    B-->>A: syn, ack=x+1, seq=y
    A-->>B: ack=y+1, seq=x+1
    note over A, B: TCP Handshake complete
    A->>B: ack=y+1, seq=x+1
    note over B: 358B received
    B->>A: ack=x+359, seq=y+1
    note over A: Ack (0B) received
    A->>B: ack=y+1, seq=x+359
    note over B: 358+50B received
    B->>A: ack=x+409, seq=y+1
    note over A: Ack (0B) received
    A->>B: ack=y+1, seq=x+409
    note over B: 358+50+80B received
    B->>A: ack=x+489, seq=y+1
    note over A: Ack (0B) received

Antworten §

a §

• Ursprungsport: 1028
• Zielport: 80
• Sequenznummer: x+409

b §

• Ursprungsport: 80
• Zielport: 1028
• Ack: x+409
• Seq: y+1

c §

• Ack: x+489

d §

Letztes Ack fehlt!