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Sample questions

posted Jun 18, 2009, 5:31 PM by Unknown user   [ updated Jun 20, 2009, 5:32 AM by Eddie Woo ]
  1. Describe situations in which each of the major network topologies would be the most appropriate.
Point to Point - in a circumstance that consists of an airforce pilot trying to send secret information back to his headquarters, a point to point network would be ideal as it allows security of data, fast relay of the information and the fact that information does not have to be carried by a lot of mediums means that it is less likely to be interfered with.
 
Mesh - a situation where a mesh topography would be benefitial is in a company consisting of a Project Management Group who have equal responsibilities within the assigned project, transmission of data is fast and inteference from other mediums is most unlikely. The LAN would be situated within an office, wiring would not be a problem. Each node within the network is able to be connected to every other node, the added redundancy of links allows data to be sent to the desired links efficiently. The Project Management Group will benefit from such a topology as continual updates and communication can occur all the time.
 
 Heirarchial - a heirarchial topology is benefitial in a workoffice environment where levels of access differ, a project manager is given full access to transmissions of information between databases of the many departments within the office whereas a member of the marketing department may be limited to viewing databases concerning profit margins and popularity of products. Security is enhanced and communication between nodes is limited to the neighbouring nodes, therefore members of departments may be able to communicate to eachother but not to the project manager.
 
Ring - a ring network is ideal in a circumstance where many researchers are using workstations to research documents concerning their further reseearch upon cancer, a node is connected to its neighbours and relay of information is quick though it may have to be transported through many nodes before it reaches its destination though in such a a case it does not matter as each researcher is entitled to read the transmitted info, security is not a problem.
 
Star - in situations where a central hub/switch/router is uselful is in the environemnt of a home, nodes are able to communicate with servers which allows processes such as printing and accessing the internet can occur. Data can be realyed between the terminals and servers efficently and of one connectionbecomes faulty all connections are not harmed.
 
Bus - a bus topology is compatible with a situation such as a school computer room, computers are able to send data to eachother, allowing students to interact and share information when doing a project, a server can be included to allow printing and managing files.
 
Converting a large organisation's information system from a wired infrastructure to a wireless infrastructure is a costly exercise. Identify specific costs involved and justify the conversion in spite of the cost.
 
Specific costs include the removal of wires and other physical equipment, this can be expensive as they may be behind walls and under the floor, the complexity of the wiring may lead to expensive removal methods.
 
The conversion allows connections between networks to be wireless, minimising an environment of clutter. The amount of information that can be sent is increased and the protocols as to how nodes will interact can become compatible with all the computers regardless of their topologies. An internet connection is also acessible when a node is on the move, it can be physically moved without loss of connection. The cost of maintaning faulty cables and routers is also greatly minimised.
 
The internet used to be called "cyberspace", which alluded to the fact that things and people on the internet inhabited another world and had no relation to the real world. This is simply no longer the case. Discuss this reality with reference to real events that have been changed or made possible only by the use of the internet.
 
The use of the internet is very much linked to reality as banking transactions and buying commodities can occur on the Internet. E-commerce has become a major industry and has simplified the idea of buying products without leaving home. Telecommuting has also revolutionised the idea of working from home, workers being able to experience flexibility with their work hours. The internet has allowed people to be aware of circumstances across the world almost instantaneously, knowledge about the situations of the world has greatly increased through media methods in the Internet. The Internet deals with real companies and people advertising their businesses and merchandise over the internet, it has become a marketing tool. The internet is very much in sync with reality as it allows people to buy and sell goods, acess real information to gain knowledge as well as revolutionise the working environment.
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