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Wan Technologies

Wan Technologies. OSI Model. Do a quick internet search to find a good picture of an OSI model. Frame relay. Packet switched network structure – Data is broken down in packets. Uses multiple routes to communicate among PCs without direct connection

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Wan Technologies

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  1. Wan Technologies

  2. OSI Model • Do a quick internet search to find a good picture of an OSI model

  3. Frame relay • Packet switched network structure – Data is broken down in packets. • Uses multiple routes to communicate among PCs without direct connection • Example – video conferencing? What happens when the quality is low??

  4. ATM (Asynchronous Transfer Mode) • Same as Frame relay BUT the main difference is in the size of the data packets. • These packets are smaller in size and are called cells. • Advantages: speed, reliability, reduction in jitter. E.g. skype calls

  5. MPLS (Multi protocol labelled switching) • Recent successor of frame relay and ATM • Designed to work with routing protols at level 3 of the OSI model. • Enable network to communicate with each other and can adapt to changes such as loss of connections, changes in bandwidth or preferred routes. • Its spots changes in the network • The route can be customised according to the customer

  6. PAN (Personal Area Network) • Think about setting up a bluetooth connection amongst some devices that you have come across. • Think about the how far these devices can operate (distance)

  7. Network Models • In group of 4 research on the internet or your text book to find out the two types of network models: OSI and TCP/IP • Find out what they are?

  8. LAN standards • IEEE (Institute of Electrical and Electronic Engineers. • Maintains LAN standards that communicate at layer 2 of the OSI model • These are defined as follows • IEEE 802.2 – Manages Ethernet data packet called frames to the upper and lower layers of the OSI model. • IEEE 802.3 – the definition of the MAC addressing on a network card and data collision detection over a variety of different speeds and media. • IEEE 802.5: Manages token ring passing over a ring topology.

  9. LAN Standards • FDDI (Fiber distributed data interface) • Uses fiber optic technology • Extends the distance of existing LAN over 200 Km. • Enables traffic to go both direction • Greater speed and efficiency • BUT gets complicates • Find out the data transfer speed in Optic fibre technology and how thick is the cable?

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