April 05
Prof. Ismael H. F. Santos -  ismael@tecgraf.puc-rio.br                                                          2
Networking Basics
nApplications Layer
nStandard apps
nHTTP
nFTP
nTelnet
nUser apps
nTransport Layer
nTCP
nUDP
nProgramming Interface:
nSockets
nNetwork Layer
nIP
nLink Layer
nDevice drivers
nTCP/IP Stack
Application
(http,ftp,telnet,…)
Transport
(TCP, UDP,..)
Network
(IP,..)
Link
(device driver,..)