PPT Slide
Ethernet packet dispatching
- An incoming packet comes into the ethernet controller.
- The ethernet controller reads it off the network into a buffer.
- A network interrupt handler reads the packet out of the controller into memory.
- A dispatch routine looks at the Data part and hands it to a higher level protocol
- The higher level protocol copies it out into user space.
- A program manipulates the data.
- The output path is similar.
- Consider what happens when you send mail.