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FAU Class Notes/Introduction to Internet Computing

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Networks Edit

Local Area Network (LAN) Metropolitan Area Network (WAN) Wide Area Network (WAN)

Levels Edit

application

  • FTP, SMTP, HTTP

transport

  • TCP, UDP

network

  • IP, routing protocols

link

  • PPP, Ethernet

physical


ProtocolsEdit

  • How to exchange information
  • Example: HTTP, FTP, IRC, etc.

Services

  • What networks offer

Interfaces

  • How services can be accessed

Developed by the RFC system and the holy IETF (Internet Engineering Task Force)

TCPEdit

reliable, in order byte stream data transfer

  • loss: acknowledgements and retransmissions

flow control

  • sender doesn't overwhelmn sender
  • relatively slow

UDPEdit

User datagram protocol [RFC 768]

  • connectionless
  • unreliable data transfer
  • no flow control
  • no congestion control
  • fast

Circuit SwitchingEdit

FDM: Frequency division multiplexing TDM: Time division multiplexing

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