Transport Layer Flow

1
Transport Layer Flow
2
Socket Connections
3
UDP Segment Structure
4
NTP

• Network Time Protocol
• Uses port 123
• UDP (User Datagram Protocol)
• Atomic Clock Synchronization
• Multiple Master Servers
• Used for
• Distributed Databases
• Client/Server
• Security
• Authentication

5
Clock Synchronization
mt
mr
Time Server
Time Client
Tround mt mr time t Clock set is t
Tround/2
6
Alternating bit protocol
7
Stop and Wait/Pipelined
8
Go-Back-N
9
Selective Repeat
10
SR Operation
11
SR windowing
12
TCP segment structure
13
TCP Segmentation
14
Sequence and Acknowledgement
15
Retransmission
16
Not Transmitted
17
Cumulative Acknowledgement
18
TCP Handshake
19
TCP Close
20
TCP sequences
21
Routing traffic
22
Multiple routers
23
TCP Slow Start
24
A Typical Wiring Closet

• Hubs Switches - No routers

25
Transport Layer
The End