A. Bandwidth alternatives B. Switching alternating C. Inter organizational networks D. Extranets
2. Which of the following statements is correct?
A. characteristic of the hub architecture of ARC-net is alternative routing.
B. characteristic of LAN is unlimited expansion
C. characteristic of LAN is low cost access for low bandwidth channels
D. characteristic of the hub architecture of ARC-net is directional zed transmission
3. A modem is connected in between a telephone line and a
A. network B. computer C. communication adapter D. serial port
4. What frequency range is used for TV transmission and low power microwave applications?
A. Very Low Frequency : 3 kHz to 30 kHz B. Medium Frequency : 300 kHz to 3 MHz
C. Ultra High Frequency : 300 MHz to 3000 MHz D. Super High Frequency : 3000 MHz to 30000 MHz
5. Which of the following statement is correct?
A. Satellite transponders use a higher frequency for reception of radiation from earth stations and lower frequency for transmission to earth stations.
B. Satellite transponders contain a device that echos the radiation without change from one point on earth to another
C. Satellite transponder contain devices that transform the message sent from one location on earth to a different code for transmission to another location
D. satellite transponders us lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations
6. We can receive data either through our television aerial or down our telephone lines and display this data on our television screen. What is the general name given to this process?
A. Viewdata B.Teletext C. Telesoftware D.Videotex
7. ASK, PSK, FSK, and QAM are examples of _____ encoding.
8. The data-link layer, in reference to the OSI model, specifies
A. data link procedures that provide for the exchange of data via frames that can be sent and received
B. the interface between the X.25 network and packet mode device
C. the virtual circuit interface to packet-switched service
9. What function does a serial interface perform in data communication?
A. Converts serial data into audio signals
B. Converts analog signals into digital signals
C. Converts parallel data into a stream of bits
D. Decodes incoming signals into computer data
10. You need to determine whether IP information has been assigned to your Windows NT. Which utility should you use?
11. Eight stations are competing for the use of the shared channel using the modified Adaptive free walk protocol by Gallager. If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention?
12. When two computers communicate with each other, they send information back and forth. If they are separated by a reasonable distance, they can send and receive the information through a direct cable connection which is called a null-modem connection. Presently what is the maximum distance in metres permitted in this null-modem connection?
13. Modulation in which the two binary values are represented by two different amplitudes of the carrier frequency is known as
A. Amplitude-shift keying
14. You have been contracted to install a windows NT network in an office that is located in a strip mall. The office is located next to the power plant of the building, so a UPS (uninterruptible power supply) has already been installed. What type of cable should you use for the network cabling? Choose the best answer.
15. Communication circuits that transmit data in both directions but not at the same time are operating in
16. In a synchronous modem, the digital-to-analog converter transmits signal to the
17. If the client receives an address from a DHCP server, what is the only information available in the Network Properties dialog box?
C. That the client is receiving its address from DHCP
18. An internetworking protocol that provides virtual circuit service across multiple X.25 protocol, is
19. Which of the following TCP/IP protocol is used for transferring files from one machine to another?
20. Which of the following is an example of bounded medium?
C. Fiber optic cable {d) All of the above
21. Which transmission mode is used for data communication along telephone lines?
22. Who invented the modem?
A. Wang Laboratories Ltd.
B. AT & T Information Systems, USA
D. Digital Equipment Corpn.
23. With an IP address starting at 200, you currently have 10 subnets. What subnet mask should you use to maximize the number of available hosts?
24. Which of the following communications modes support two-way traffic but in only one direction of a time?
25. Which of the following TCP/IP internet protocol a diskless machine uses to obtain its IP address from a server?
26. In OSI network architecture, the dialogue control and token management are responsibilities of
27. Which of the following transmission systems provides the highest data rate to an individual device
28. Which of the following connectivity devices is used to extend a network on a purely mechanical basis?
29. The IEEE 802 project of the 1980s involved further defining the lower two layers of the OSI model. A number of standards were agreed upon during that time. Which of the following is the standard for Ethernet?
30. Which of the following digits are known as the terminal number of the Network User Address (NUA)?
31. Which of the following device is used with an X.25 network to provide service to asynchronous terminals
D. Packet assembler/disassemble
32. A medium access control technique for multiple access transmission media is
33. The core diameter of a single-mode fibers is about
A. 10 times the wavelength of the light carried in the fiber
B. 10 times the fiber radius
C. 7 times the light carried in the fiber
D. 3 times the wavelength of the light carried in the fiber
34. Which of the following TCP/IP protocol is used for remote terminal connection service?
35.Networks where end user workstations are tied to LAN servers to share resources and application processing.
A. Internetworked enterprise
B. Information super highway
C. Business applications of telecommunications
D. Client/Server networks
36. The frequency range : 300 kHz to 3 MHz is used for
D. microwave communications, satellite and radar
37. With an IP address of 201.142.23.12, what is your default subnet mask?
38. A smart modem can dial, hang up and answer incoming calls automatically. Can you tell who provides the appropriate instruction to the modem for this purpose?
A. Communications software
B. Error detecting protocols
C. Link access procedure (LAP)
39. IEEE project 802 divides the data link layer into an upper _____ sublayer and a lower _____ sublayer.
40. Two computers that communicate with each other use a simple parity check to detect errors for ASCII transmissions. Which of the following events will always lead to an undeleted error?
A. one bit or any odd number of bits inverted in a block of data during transmission
B. two bits or any even number of bits inverted in a block during transmission
C. one bit or any odd number of bits inverted in a byte during transmission
D. two bits or any even number of bits inverted in a byte during transmission
41. Which utility is an all-purpose tool for troubleshooting TCP/IP problems?
42. In communication satellite, multiple repeaters are known as
43. In OSI network architecture, the routing is performed by
44. Which of the following communications lines is best suited to interactive processing applications?
45. What is the first octet range for a class B IP address?
46. The 32-bit internet address 10000000 00001010 00000010 00011110 will be written in dotted decimal notation as
47. Which of the following items is not used in Local Area Networks (LANs)?
48. Error detection at a data link level is achieved by
B. cyclic redundancy codes
49. RS-232-G
A. is an interface between two data circuit terminating equipment as examplified by a local and remote modem
B. is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment
C. specifies only the mechanical characteristics of an interface by providing a 25-pin connector
D. requires only 7 pin out of 25 in order to transmit digital data over public telephone lines
50. A subdivision of main storage created by operational software is referred to as a:
KEY ANS
1.A
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2.D
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3.C
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4.C
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5.A
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6.D
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7.B
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8.A
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9.C
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10.C
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11.B
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12.C
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13.A
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14.E
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15.B
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16.A
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17.C
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18.A
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19.D
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20.D
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21.B
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22.B
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23.C
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24.B
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25.B
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26.A
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27.A
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28.D
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29.B
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30.C
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31.D
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32.A
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33.A
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34.A
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35.D
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36.A
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37.D
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38.A
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39.D
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40.D
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41.C
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42.D
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43.A
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44.C
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45.D
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46.D
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47.B
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48.B
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49.B
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50.D
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