Учебное пособие состоит из двух частей и англо-русского словаря. Материалом для пособия послужило американское издание для изучающих компьютер P. Norton "Introduction to Computers"

I. Read and translate the text:

A topology is the physical layout of the cables and devices that connect the nodes of a network. The three basic topologies are bus, star, and ring. These topologies are so named because of the shape of the network they create. The less common type of physical topology is the mesh topology. The bus network uses a single conduit to which all the network nodes and peripheral devices are attached. Each node is connected in series to a single cable. At the cable's start and end points, a special device called a terminator is attached. A terminator stops the network signals so they do not bounce back down the cable.

Vocabulary:

1. 
   topology [tq'poloGi] – топология сети
   
2. 
   layout ['lei'aut] – расположение, схема расположения
   
3. 
   cable ['keibl] – кабель
   
4. 
   bus [bAs] – шина
   
5. 
   star [stR] – звезда
   
6. 
   ring [riN] – кольцо
   
7. 
   shape [Seip] – форма
   
8. 
   mesh [meS] – петля, ячейка, сетка
   
9. 
   conduit ['kond(ju)it] – канал
   
10. 
    in series [in'siqriqs] – последовательно
    
11. 
    terminator ['tq:mineitq] – терминатор, заглушка
    
12. 
    to bounce [bauns] – зд. возвращаться
    
13. 
    hub [hAb] – концентратор, ядро сети
    
14. 
    to monitor ['monitq] – осуществлять текущий контроль, контролировать
    
15. 
    traffic ['trxfik] – поток данных в сети, трафик
    
16. 
    to prevent [pri'vent] – предотвращать, мешать
    
17. 
    collision [kq'liZn] – столкновение
    
18. 
    to affect [q'fekt] – влиять
    
19. 
    to be unable ['An'eibl] – быть не способным
    
20. 
    circular ['sq:kjulq] – круговой
    
21. 
    chain [tSein] – цепь
    
22. 
    to complete [kqm'pli:t] – завершать
    
23. 
    to examine [ig'zxmin]– исследовать, рассматривать
    
24. 
    token ['tqukqn] – маркер, метка
    
25. 
    to address [q'dres] – адресовать
    
26. 
    expensive [iks'pensiv] – дорогостоящий
    
27. 
    to implement ['impliment] – разрабатывать, внедрять, реализовывать
    
28. 
    environment [in'vaiqrqnmqnt] – конфигурация сети
    
29. 
    to run [rAn] – тянуться
    
30. 
    advantage [qd'vRntiG] – преимущество
    
31. 
    arrangement [q'reinGmqnt] – размещение, расположение
    
32. 
    to fail [feil] – повреждаться, давать сбой
    
33. 
    to deliver [di'livq] – доставлять
    
34. 
    to go down [gqu 'daun] (went, gone) – зд. разрываться
    
35. 
    to route [ru:t] – передавать, направлять
    
36. 
    to make sure [meik 'Suq] – убедиться, удостовериться
    
37. 
    to get through [get 'Tru:] (got, got) – проходить
    

II. Answer the questions:

1. 
   What is a topology?
   
2. 
   What are the basic topologies?
   
3. 
   Why are they so called?
   
4. 
   What is the bus network?
   
5. 
   What is a terminator used for?
   
6. 
   What is the most common topology in use today?
   
7. 
   How is the star network organized?
   
8. 
   How do the groups of data reach their destinations?
   
9. 
   What tasks do intelligent hubs perform?
   
10. 
    Characterize the ring topology.
    
11. 
    What happens if the data is not addressed to the node examining it?
    
12. 
    How are computers connected in the mesh topology?
    
13. 
    What is the advantage of the mesh topology?
    
14. 
    What is the mesh topology used for?
    

III. Tell whether the following statements are true or false:

1. 
   There are five basic network topologies.
   
2. 
   In the bus network each node is connected in series to a single cable.
   
3. 
   In the star network all nodes are connected to the terminator and communicate through it.
   
4. 
   A terminator stops the network signals so they do not bounce back down the cable.
   
5. 
   In the star network groups of data are routed through the hub and sent to all the nodes.
   
6. 
   A broken connection in a star topology does not affect the rest of the network.
   
7. 
   In the ring topology the nodes are connected in a circular chain, with each node connected to the next.
   
8. 
   In the ring topology if the data is not addressed to the node examining it, that node passes it along to the next node in the ring.
   
9. 
   The mesh topology is the most widely used network topology.
   
10. 
    The mesh topology is used for connecting routers on the Internet.
    

IV. Fill in the blanks:

1. 
   There are the following network topologies: _________, _________, and _________.
   
2. 
   The _________ uses a single conduit to which all the network nodes and peripheral devices are attached.
   
3. 
   The bus network uses a device called a (an) _________ for stopping the network signals.
   
4. 
   In the star network all nodes are connected to the ________ and communicate through it.
   
5. 
   Some intelligent hubs can _______ traffic and help prevent _______.
   
6. 
   If the hub is ________, all nodes connected to that hub are unable to communicate.
   
7. 
   In the ring network, a ________ is sent through the ring from one computer to the next, until it reaches its destination.
   
8. 
   With the mesh topology, if one connection goes down, there are other ways to route the data to its ________.
   

1. Bus, ring, and mesh are examples of

2. In a star-topology network, all computers connect to a central device called a

1. 
   Server c. Hub
   
2. 
   Router d. Gateway
   

3. Which is the biggest advantage of a mesh-topology network?

1. 
   It is the most expensive to implement
   

1. 
   Bus network c. Ring network
   
2. 
   Star network d. All the above
   

1. 
   The most expensive topology c. The least common topology
   
2. 
   The most common topology d. The cheapest topology
   
   6. 
      A device called a hub is placed in the center of the
      

1. 
   Ring network c. Star network
   
2. 
   Mesh network d. All the above
   

6. 
   This network topology allows to pass a token from node to node.
   

1. 
   Mesh network c. Bus network
   
2. 
   Star network d. None of the above
   

6. 
   In the star network all the nodes are connected to it.
   

1. 
   Terminator c. Cable
   
2. 
   Token d. Hub
   

VI. Match each item to the correct statement below:

1. 
   Bus c. Ring
   
2. 
   Star d. Mesh
   

1. 
   The most expensive topology.
   
2. 
   Uses a single conduit.
   
3. 
   Requires a hub.
   
4. 
   Passes a token from node to node.
   
5. 
   Uses terminators.
   
6. 
   The most common topology.
   

1. 
   Hub c. Conduit
   
2. 
   Terminator d. Token
   

7. 
   Data passed through the ring network.
   
8. 
   Device for stopping network signals.
   
9. 
   All the network nodes and peripheral devices are attached to it.
   
10. 
    Device placed in the center or the star network.
    

VII. Speak on the contents of the text using the following chart:

Text 11