1. Print ServerWeb ServerDatabase of Server It is a computer that Handle the data flows Between the printer and the users’ Computer. Is a computer that hold web pages and make them available to users Over the internet. A database is data storage, in a form that can be organized and searched.The server needs to store information about the nodes on the network. The server can use one or more databases in order to carry out its activities.

2. Suppose instead of transmitting each bit three times, each was transmitted only twice. If there is a single error in the received data, could it be detected? Could it be corrected? Explain transmitting each bit twice is an example of an error detecting code, where the triplet scheme is an error correcting code. Error detecting codes can be used when for example a receiver can request the re-transmission of data known to contain an error. If there is no possibility of requesting a repeat, error correcting codes are often used (in transmitting images from deep space).

3. A common bitmap format for displaying computer images uses 24 bits for each pixel: a. How many pixels are required for 800 x 600 screen resolution? 800 X 600 = 480 000 Pixels. b. How many bits of data does this require for each image? 480 000 X 24 = 11 520 000. Bits. c. If you are using ‘56 Kbps’ dial-up modem that connects only up to 32 Kbps maximum. How long would such an image take to download at 32 Kbps. 1) convert 32 kbps to Bits 32 X 1000 = 32 000 bits 2) 11 520 000 / 32 000 = 360 second. / 60 = 6 Mints d. If you installed a new broadband connection operating at 256 Kbps, how long will a single image take to download over a 256 Kbps connection? 1) convert 256 kbps to bits :- 256 X 1000 = 256 000. Bits 11 520 000 / 256 000 = 45 second.

4. A supermarket may use a number of different Network Blocks None of the above Databases

5. A magnetic storage is one type of different types of storage. At any device did in a computer? Buffer HD DVD Flash Memory CD-ROM.

6. ------------ increases the practical distance between nodes by regenerating the signal and passing it on. A repeater An Interface A fiber optical cable

7. Networked devices need protocols when communicating with each other to: A-Establish a common language & Control use of the communication link B-Establish a common language C- Control use of the communication link

8. Which of the following examples are includes in the I&CT: a. Landline Phone, Mobile Phones, E-mail b. Landline Phone, Mobile Phones, TV c. TV, Mobile Phones, E-mail

9. In a counterscreen, images are generated by dividing the display into a large number of tiny units called pixels

10. If you are using five bits to code 17 colors, how many codes are unused?

11. If you are using 4 bits to code 11 colors, how many codes are unused?

12. How many colors can be represented by 8 bits?

13. Any coding scheme that allocates a binary code to each pixel in order to define its color and brightness is called……… Bitmap

14. Transmitting each bit twice is an example of ………. Error detection code

15. Estimate how many times faster the data rate of the original Ethernet standard (10 Mbps) is, a compared to the data rate of a modern standard dial- up modern of 56 kbps ( Hint: round down the dial – up modem rate to 50 kbps) 10 Mbps = 10, 000, 000 bps 50 kbps = 50 000 bps 10 000 000 / 50 000 = 200 The first commercial Ethernet network was about 200 times faster than a modern 56 kbps modem dial – up connection.

16. Explain why routers are being used? 1- Router holds information about structure of a network and can make decisions about how data should be routed through it. 2- Being used to connect together different types of LAN, a router connects different types of network ( LAN to WAN)

17. Data can't be considered information until it is given meaning, explain the difference between data and information and give examples. Data is a representation of information so that it can be conveyed, manipulated or stored. Information is the meaning that people give to data a particular context. Many examples can be considered.

18. Which of these devices provided to store applications? c. H.D.

19. In a counter screen, images are generated by dividing the display into a large number of tiny units called ________ pixels

20. A device that typically connects to a network and transmits for 15 milliseconds in every second will have a duty cycle -----------.. 1.5%

21. A typical device used in a smart home network has some characteristic: The small quantity of data needed to represent the signal, the low duty cycle and the tolerance to delay.

22. ___________ Technology provides identifying individual items Radio Frequency Identity (RFID)

23. How many colors can be represented by 8 bits? 256 colors.

24. Which of the following are the components of the system? c. Activities or ideas

25. The term _______ is used to describe some very different interconnected systems. network

26. Any coding scheme that allocate a binary code to each pixel in order to define its color and brightness is called bitmap

27. A very powerful form of lossless coding is ______ dictionary-based coding

28. -------- Band of radio frequencies is available internationally for unlicensed users. 2.4000 GHz to 2.4835 GHz

29. Database software, stores information in a form that can be organized and searched. Which of the following can be used? Access.

30. A database server in a supermarket checkout system usually stores the following information: b. Both a & d.

31. Which of these devices provided to store applications? c. H.D.

32. A _____________ is normally used for individual people and things in ICT system. Unique identifier.

33. Each ZigBee network must include a network coordinator

34. Monitoring and control devices used in the home also tend to be tolerant of Reliability

35. Which of the following examples are includes in the I&CT: a. Landline Phone, Mobile Phones, E-mail

36. What of these devices provided to store operating system: d. H.D.

37. Process of modifying the carrier is called _______________. modulation

38. A _______________________ takes the data from the sender, modifies the carrier, and then sends the resulting signal through the communication link. trter

39. Stations communicate with each other via a wireless _______________ access point

40. In _____________, the representation is a direct counterpart of real- world aspect that we are trying to capture. analogue

41. In _____ representation, codes using a limited set of symbols are used to represent the original information. digital

42. A Wi-Fi link between a notebook computer and a hostpot can handle data up to 60 megabits per second. How many bytes per second is that ? 60 megabits = 60 000 000 bps 60 000 000 / 8 = 7500000 bytes per second If a kilobyte is 1024 bytes of data, how many bits of data does this represent? There are 8 bits in a byte, and `kilo` here means 1024. So a kilobyte is 1024 x 8 = 8192 bits

43. A magnetic storage is one type of different types of storage. At any device did in a computer? Choose one answer. Temporary storage device b. Local Area Network or LAN. c. Meaning that people give to data in particular contexts d. None of the above

44. Using the best of three decoding strategies. A node received a binary sequence as follows:- 111 000 010 000 011 100 000 011 What is the original binary sequence sent ? A) 10101001 B) 10011001 C) 10000101 D) 10001001

45. Graphics and image editing software allows you to create and edit drawings and images. What of this software can you used? Choose one answer. a. Excel. b. Access. c. Digital photography. d. Power point.

46. Buying and selling things using the internet is known as: Choose one answer. a. Electronic Commerce. b. A Temporary storage device. c. Everywhere. d. b and c

47. Which of the following is used to store applications: Choose one answer. a. Processor. b. ALU. c. H.D. d. RAM. e. ROM. f. Flash memory.

48. A device that typically connects to a network and transmits for 15 milliseconds in every second will have a duty cycle -----------. Choose one answer. a. 1.5% b. 2.0% c. 5% d. 10%

49. -------- band of radio frequencies is available internationally for unlicensed users. Choose one answer. a. 2.4000 GHz to 2.4835 GHz b. 100 MHz to 108 MHz c. 500 KHz to 800 KHz d. 89 GHz to 108 GHz

50. The term often used to describe devices connected to a wired network is -----------. Choose one answer. a. node b. MAC c. bandwidth d. mesh

51. Fill the blanks : 1) The term _______ is used to describe some very different interconnected systems. 1) network 2) The maximum data rate that a communication link can support is called its __________. bandwidth 3) The sort of communication link is used by Bluetooth is __________ link. radio

52. Fill the blanks : 1) A _______ increases the practical distance between nodes by regenerating the signal and passing it on. repeater 2) A _________ is a discrete portion of a network in which all nodes share the communication link. segment 3) Segments are joined together with a _________. bridge

53. Some people prefer to take notes in a non-linear way and to be able to visualize the connections between different ideas.Mention ways you have learned to present ideas or information in a diagram rather than as text with specifying the role of each. Answer: Mind maps and concept maps re used when developing your own ideas on a subject. Spray or spider diagram summarize ideas that other people have written or spoken

54. How do Wi Fi stations find each other ? Answer: Each station must have a means of being uniquely identified by A MAC address. every message data frame sent must contain the MAC address of the source, destination and access point.

55. A Wi-Fi link between a notebook computer and a hotspot can handle data up to 60 megabits per second. How many bytes per second is that ? Answer key 60 megabits = 60 000 000 bps 60 000 000 / 8 = 7500000 bytes per second

56. Estimate how many times faster the data rate of the original Ethernet standard (10Mbps) is compared to the data rate of a modern standard dial up modern of 56 kbps Answer: 10 Mbps = 10 000 000 bps. 50 kbps = 50 000 bps (10 000 000 / 50 000 = 200