TCP/IP summary

Skills: none

IT concepts: review

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• Internet concepts– Applications– Technology (communication)– Implications for

• Internet skills– Application development– Content creation

Where does this topic fit?

The application layer

Application Program, forexample, a Web client

Application Program, forExample, aWeb server

A TCP/IP network

The transport layer, TCP and UDP

A C B → A B CWhich port (application program)?

The Internet layer, IP

The data link layer, Ethernet and WiFi

Data linklayer

Data linklayer

Internet layer

or

The physical layer, media and modulation

TCP/IP protocol layers from 2,000 feet up

Layer Function

Application Do useful work like Web browsing, email, and file transfer

Four Lower layers

Handle communication between the client and server

TCP/IP protocol layers from 1,000 feet up

Application

Transport

Internet

Data link

Physical

Programs that do useful work like retrieve Web pages, copy files, send and receive email, etc.

Make client-server connections and optionally control transmission speed, check for errors, etc.

Route data between networks

Route data within the local area network

Specify what medium connects two nodes, how binary ones and zeros are differentiated, etc,

TCP/IP protocols

Application

Transport

Internet

Data link

Physical

Many -- HTTP, FTP, POP, SMTP, etc.

TCP and UDP

IP

Ethernet and WiFi

Many – fiber, copper, wireless

TCP/IP summary

Skills: none

IT concepts: review

This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.