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Topology refers tо the shape of a network. There are three basic physical topologies.
§ Star: there is a central device to which all the workstations are directly connected. The central position can be occupied by a server or a hub, a connection point of the elements of a network that redistributes the data.
§ Bus: every workstation is connected to a main cable called a bus.
§ Ring: the workstations are connected to one another in a closed loop configuration.
§ There are also mixed topologies like the tree, a group of stars connected to a central bus.
Ex. 1. Read these descriptions of different physical topologies of communication networks and match them with the terms in the text “Network topology”.
1 All the devices are connected tо a central station.
2 In this type of network there is a cable to which all the computers and peripherals are connected.
3 Two or more star networks connected together; the central computers are connected to a main bus.
4 Alt devices (computers, printers, etc.) are connected to one another forming a continuous loop.
Ex. 2. Which topologies do these statements refer to?
1. If one of computers fails, the whole network will be affected.
2. If we remove a computer from the network, it won’t affect the other computers.
3. If the main cable fails, the whole networks will fail.
4. If the central server fails, the whole network will fail.
5. If a cable breaks, the whole network will be affected.
6. If a computer fails, it won’t affect the other computers.
Language work: Predicting Consequences
The sentences in Ex. 2 predict the consequences of an action. For example:
The cable fails. The whole network will fail.
(action) (consequence)
If the cable fails, the whole network will fail.
Note that the action is in the Present simple, and the consequence in the Future simple.
Study these other examples.
If you don’t use the right password, you won’t get access to the network.
If you don’t save your document, you will lose the information.
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| Ex. 1. Identify the Internet crimes sentences (1-6) refer to. Then match them with the advice below (a-f). | | | A) Try to answer these questions. |