Mike's PBX Cookbook

OSI & TCP/IP Models

FunctionOSITCP/IPProtocols
Data GenerationHost LayersApplication7ApplicationSoftwareHTTP, SMTP, POP, FTP, SSH, Telnet...
Encryption & formattingPresentation6TLS, SSL, AFP, ICA, LPP, NCP, NDR...
Establish connectionSession5NetBIOS, SMB, NCP, F2F, RPC, SDP...
Delivery and SequencingTransport4TransportNetworkTCP, UDP, DCCP, SCTP, RSVP...
Routing to DestinationMedia LayersNetwork3InternetIP, NAT, ARP, BOOTP, ICMP...
Local Network Host DeliveryData Link2InterfacePPP, HDLC, DSL, ISDN, FDDI...
Access to MediaPhysical1Ethernet, Wi-Fi, Modems...
  1. Does it link? (Layers 1, 2, 3)
  2. Can you ping it? (Layer 4)
  3. Does it work? (Layers 5, 6, 7)
OSI Model Mnemonics: People Don’t Need To See Paula Abdul