1. What is the database of a server. Web server. Print Server
What is the database of a server? Web server ? Print Server ? Explain why it is being used
Print Server
Web Server
Database 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? X 600 = Pixels. b. How many bits of data does this require for each image? X 24 = 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 X 1000 = bits 2) / = 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 : X 1000 = Bits / = 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
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,
b. Landline Phone, Mobile Phones, TV
c. TV, Mobile Phones,

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 = bps
/ = 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?

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.
GHz to 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,

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 = bps
/ 8 = 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 So a kilobyte is 1024 x 8 = 8192 bits

43. A magnetic storage is one type of different types of storage
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
Using the best of three decoding strategies. A node received a binary sequence as follows: What is the original binary sequence sent ? A) B) C) D)