Contents


Introduction ..............................................................................................................................3

1 Organization LAN ............................................. ................ 5

1.1 The place and role of local networks ............................................ .......................... 12

1.2 Structure LAN ............................................... ................................................. 17

1.3 Types LAN .........................................................................................................19

2 The principle of construction of computer networks ............................................. .................. 28

2.1 Network Devices and means of communication ........................................... 33

2.2 Characteristics of topology "star" ............................................ ................. 36

2.3 Characteristics of other topologies .............................................. ................. 39

3 The ambiguity of the notion of topology .............................................. ............................ 42

3.1 Topologies computer network .............................................. ..................... 44

3.2 The process of protecting data on the LAN ............................................ ................ 50

Conclusion ............................................................... ............................ .... 52

Glossary ................................................................ ... .......................... .... 55

List of sources used ............................... ...... ............ ... ......... 58

Abbreviations ............................................. .. ... .............................. ...... 60

Appendix A Line topology ...... .. ...................................................... 61

Appendix B star topology ................................................... ..62