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3 Network communication standards

3 Network communication standards. Network standards established to ensure hardware and software components will work on any network . Standards specify how: Computers access the network Type of medium used Speed of data transfer Types of cable or wireless supported. Protocols & OSI.

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3 Network communication standards

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  1. 3Network communication standards • Network standards established to ensure hardware and software components will work on any network. • Standards specify how: • Computers access the network • Type of medium used • Speed of data transfer • Types of cable or wireless supported

  2. Protocols & OSI A protocol is a standard that defines how two computers or devices on a network transmit data. Open Systems Interconnection, (OSI) is a standard for network communications that define a model for using protocols in seven layers.

  3. Ethernet • The standard networking technology • The Ethernet rules specify: • How networking hardware must work (e.g. cables, network cards, switches) • How networking software must work • Such standardisation lets any Ethernet computer communicate with any other, regardless of manufacturer, operating system etc.

  4. Basic Hardware - Cables • Unshielded twisted pair cable (UTP) • Types: Category 6 (CAT6) • Maximum cable length: 100m • Metal core, electrical signals • Only one network signal can travel along a cable at a time • Poorly shielded from electromagneticinterference • Bandwidth: 10, 100, 1,000 Mbps

  5. Fibre Optic Cable, FOC • Glass or plastic core • Optical (laser light) signals • Max length: kilometres (no electrical resistance = little signal fade) • Immune to EMI (electromagneticinterference) • MASSIVE bandwidth! • MASSIVE speed (speed of light)

  6. TCP/IP • Common method of packaging data for network transmission. • The protocol on which the internet is based and is the standard for transmission over the internet. • TCP/IP uses smaller packets than other protocols. This is an advantage on the internet as there are many different pathways from the originating device to destination device & packets don’t all travel same path; small packets give many options to network m.mentsof.ware to manage load balancing.

  7. 802.11 wireless standard • Defines how two computers or devices can communicate using radio waves. • Network using 802.11 standard is known as a Wi-Fi network. • Standard comes in different versions signified by an a, b, g or n notation • 802,11n transfer rate of 108 Mbps to 600 Mpbs & supports 70 metres Vs 50 mtrs of earlier versions

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