Telecommunications and networks, the Internet
Telecommunications and networks, the Internet
Telecommunications and networks, the Internet
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Packed‐switched Networks And PacketCommunicationsKey networking technologies (cont.)• TCP/IP <strong>and</strong> connectivity– Connectivity between computers enabled by protocols– Protocols: Rules that govern transmission of informationbetween two points– Transmission Control Protocol/<strong>Internet</strong> Protocol (TCP/IP)• Common worldwide st<strong>and</strong>ard that is basis for <strong>Internet</strong>– Department of Defense reference model for TCP/IP•Four layers1. Application layer2. Transport layer3. <strong>Internet</strong> layer4. Network interface layerFIGURE 7-3Data are grouped into small packets, which are transmitted independently overvarious communications channels <strong>and</strong> reassembled at <strong>the</strong>ir final destination.6-136-14The Transmission Control Protocol/ <strong>Internet</strong>Protocol (TCP/IP) Reference ModelOutlineThis figure illustrates <strong>the</strong> fourlayers of <strong>the</strong> TCP/IPreference model forcommunications1. <strong>Telecommunications</strong> <strong>and</strong> Networking in Today’s BusinessWorld2. Communications Networks3. The Global <strong>Internet</strong>4. Wireless NetworksFIGURE 7-46-156-16
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