网络模型(待补充)
Innternet protocol stack
| application |
|---|
| transport |
| network |
| network |
| link |
| physical |
????Application
supporting network applications:FTP,SMTP,HTTP
????Transport
process-process data transfer:TCP,UDP
????Network
routing of datagrams from source to destination:IP,routing protocols
????Link
data transfer between neighboring network elements:Elements,802.111(WiFi),PPP
????Physical
bits “on the wire”
ISO/OSI reference model
| application |
|---|
| presentation |
| session |
| transport |
| network |
| link |
| physical |
????presentation
allow applications to interpret meaning of data,e.g.,encryption,compression,machine-specific conventions
????session
synchronization,checkpointing,recovery of data exchange
????Internet stack “missing” these layers!