dive into the deep of network traffic


start with the network models:

  1. OSI Model
    • The OSI basic model was standardized as ISO/IEC 7498 in 1983
    • The industry recommended standart
  2. TCP/IP
    • Almost all networks in use today have standardized on the TCP/IP model
    • Also know as the DoD model (Department of Defense)

the seven layer OSI model:

layer name protocols
layer 7 application layer https smtp ftp ssh
layer 6 presentation layer ascii mpeg jpeg midi
layer 5 session layer netbios sap sdp nwlink
layer 4 transport layer tcp udp spx
layer 3 network layer ip ipx
layer 2 datalink layer ethernet token-ring fddi appletalk
layer 1 physical layer wired wireless