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Communication Methods and Media

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Communication Methods and Media Task 1 Method Description of Method How Used Within Insurance Company Simplex Communication in only one direction. Head office sends sales advisors updates using pagers. Pagers can only receive data and cannot send data, therefore this is simplex communication. Half-duplex A channel that can carry data in both directions but not at the same time. When sales advisors are working in pairs going door to door they use walkie talkies to communicate with each other, this is half duplex communication. Duplex This is when communication can take place in both directions at the same time. Within the company e-mail is used as a communication tool. This is duplex communication. Parallel This is when multiple bits of data are sent at once and each bit uses a separate wire. This is suitable for short distances. Because parallel transmission is used within very short distances it would be used within the company's computer system. E.g. buses. Serial Serial communication is when data is sent over a single wire and timing information is required. This is slower than parallel but is suited to long distances. ...read more.


802.11a transmits on a 5GHz range and therefore is not compatible with the other two standards, it also transmits 54Mbps. Insurance mobile sales representatives connect their laptops to the office network. If not transmitting large amounts of data, using WiFi is ideal as there is no hassle of connecting with wires. Users can also connect anywhere that is within range of the WiFi. Task 3 The insurance company are extending their premises and the engineers will need to install additional networking facilities for both desktops and laptops. > There will be 300 employees using the extension, 200 of these will be using the extension five days a week between 9am and 5pm, 100 employees will be working mostly off site but will need to use the extension as and when needed. All users will need to access the company's main network. > Large amounts of data will need to be transmitted at high speeds (approximately 30Gbps). > The extension is a permanent fixture to the company and will be used for the foreseeable future. > There is no heavy duty electronic processing equipment so interference is not a major problem. ...read more.


Depending on the company situation and requirements depends on which solution is more effective. In this case it is more effective to use a wired solution (optical fibre) rather than a wireless one (WiFi). This is because: > The company needs to transmit high volumes of data that the WiFi could not cope with, whereas optical fibre can. > There will be 200 people using the extension at all times that will all need a reliable and fast network connection and a further 100 that will need the same when they are at the office. Optical fibre would be able to deal with this amount of traffic. > This extension is a permanent fixture and is being used for the foreseeable future so there is no reason not to lay wires if it is possible to do so. If this were a temporary extension a wireless solution would be preferred as the company would not want the hassle of laying wires that are only going to be used temporarily. > Wired solutions are more secure than wireless ones and as the company has stated that security is a concern a wired solution would meet their needs. > Wired connections have a reliable and fast connection of a consistent quality, whereas the quality of a wireless connection varies. 1 Mark Minifie ...read more.

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