Download Unit 9. Troubleshooting

TCP/IP Data Flow
Send
Receive
Application
Write Buffer
Read Buffer
TCP
Socket Send
Buffer
Socket Receive
Buffer
IP
Network Interface
Hardware
Figure
IP Input Queue
Transmit Queue
Transport
Receive Queue
Medium
9-3. TCP/IP Data Flow
Notes:
The standard debugging approach is to start at the lowest layer, the one everything else depends
on, and work your way up testing and checking as you go. ping is a good command to begin the
test of connectivity.