This document discusses computer networks and their basic components and functions. It defines key terms like analog and digital signals, transmission media like twisted pair cables and fiber optics, network topologies like bus, ring and star configurations, common network devices like hubs and switches, the client-server model, and examples of network services and applications including email, file sharing, and video conferencing. It provides an overview of how data is transmitted across networks using various protocols and hardware connections between senders and receivers.

1. 7

3. MANU
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

4. 

5. 
Sender)
Receiver)
Data)
Medium)
Protocol)

6. 
Analog Signal)
Sine Wave
Hertz)

7.  Digital Signal)
Bit Rate

8. MODEM

3
1.
2.
3.

9. 1.
Serial port

10. 2.

11. 3.
Serial port

12. 
2
1. Point-to-point
Lease
Line)
Simplex) Half-duplex)
Full-duplex)

13. 2. Multipoint)

14.  Data Transmission

 serial data
transmission)
 parallel data
transmission)

15. serail data
transmission)

16.  parallel data
transmission)

17. 

18. 1. Simplex
Transmission)

19. Half-Duplex Transmission)

20. 3.
Full-Duplex Transmission)

22. 1. Wire Media)
 Twisted-Pair Cable)
 Coaxial Cable)
 Optical Fiber Cable)
2. Wireless
Media)
 Infrared)
 Radio Wave)
 Terrestrial
Microwave)
 Satellite

24. Computer Network )

25. 

26.  transmission medium)

27. 
hardware)

28. 

29. TOPOLOGY)

30. bus topology)

31. ring topology)

32. star topology)
hub)

33. 4.
(Mesh Topology)

34. 5.
Hybrid Topology)

35. 4
1. server

36.  File server
 Database Server
 Print Server
Print Server
 Internet Server
 Web Server Web
Protocol HTTP
Website)
 Mail Server

37. 2. Workstation)
3. Client
4. Terminal

38. COMPUTING ARCHITECTURE

centralized processing)
client/server processing)

39. Local Area
Network : LAN)
2.
Metropolitan Area Network : MAN)
3. Wide
Area Network : WAN)

40. Local Area Network : LAN)

41. Metropolitan Area Network :
MAN
Lan Wan

42. Wide Area Network : WAN)

43. 

Sender)
Receiver)
Data)
Medium)
Protocol)

44. Electronic Mail : E-mail)
Voice Mail)
Facsimile Fax)

45. Conferencing)
Video Conferencing
Global Positioning
Systems : GPSs)
Electronic Data
Interchange : EDI)

46. http://armka2518.exteen.com/20090116/entry-2
http://ronaldokaa.blogspot.com/