MCQOPTIONS
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MCQOPTIONS
This section includes 105 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Network knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which among the following signal is not standard RS-232-C signal? |
| A. | VDR |
| B. | RTS |
| C. | CTS |
| D. | DSR |
| Answer» B. RTS | |
| 2. |
Which among the following does not allow multiple uses or devices to share one communication line? |
| A. | doubleplexer |
| B. | multiplexer |
| C. | concentrator |
| D. | controller |
| Answer» B. multiplexer | |
| 3. |
Which amogn the following is considered a broad band communication channel? |
| A. | coaxial cable |
| B. | fiber optics cable |
| C. | microwave circuits |
| D. | all of above |
| Answer» E. | |
| 4. |
Which among the following communications lines is best suited to interactive processing applications? |
| A. | narrow band channel |
| B. | simplex lines |
| C. | full duplex lines |
| D. | mixed band channels |
| Answer» D. mixed band channels | |
| 5. |
Which among the following is not a transmission medium? |
| A. | telephone lines |
| B. | coaxial cables |
| C. | modem |
| D. | microwave systems |
| Answer» D. microwave systems | |
| 6. |
In a synchronous modem, the digital-to-analog converter transmits signal to the |
| A. | equilizer |
| B. | modulator |
| C. | demodulator |
| D. | terminal |
| Answer» B. modulator | |
| 7. |
A communications device that combines transmissions from several I/O devices into one line is a |
| A. | concentrator |
| B. | modifier |
| C. | multiplexer |
| D. | full-duplex line |
| Answer» D. full-duplex line | |
| 8. |
Which among the following types of channels moves data relatively slowly? |
| A. | wide band channel |
| B. | voice band challen |
| C. | narrow band channel |
| Answer» D. | |
| 9. |
Which among the following transmission systems provide the highest data rate to in individual device? |
| A. | computer bus |
| B. | telephone lines |
| C. | voice and mode |
| D. | lease lines |
| Answer» B. telephone lines | |
| 10. |
Unmodulated signal coming from a transmitter is known as |
| A. | carrier signal |
| B. | baseband signal |
| C. | primary singal |
| D. | None of these |
| Answer» C. primary singal | |
| 11. |
Method of communication in which transmission takes place in both directions, but only in one direction at a time, is called |
| A. | simplex |
| B. | four wire circuit |
| C. | full duplex |
| D. | half duplex |
| Answer» E. | |
| 12. |
Thick coax have maximum segment of |
| A. | 500 m |
| B. | 200 m |
| C. | 100 m |
| D. | 700 m |
| Answer» B. 200 m | |
| 13. |
Different computers are connected to a LAN by a cable and |
| A. | modem |
| B. | interface card |
| C. | special wires |
| D. | telephone lines |
| Answer» C. special wires | |
| 14. |
Modem is used in data trasmission. When was it involved and in which country ? |
| A. | 1963, USA |
| B. | 1965, Germany |
| C. | 1950, USA |
| D. | 1950, Japan |
| Answer» D. 1950, Japan | |
| 15. |
Simple network management protocol (SNMP) is implemented with a daughter board in |
| A. | the nodes |
| B. | the server |
| C. | the hubs |
| D. | a separate PC that manages the network |
| Answer» D. a separate PC that manages the network | |
| 16. |
Fibre optics have maximum segment |
| A. | 500 m |
| B. | 200 m |
| C. | 100 m |
| D. | 2000 m |
| Answer» E. | |
| 17. |
Twisted pair have maximum segment of |
| A. | 500 m |
| B. | 200 m |
| C. | 100 m |
| D. | 2000 m |
| Answer» D. 2000 m | |
| 18. |
In networking terminology UTP means |
| A. | Unshielded Twisted pair |
| B. | Ubiquitious Teflon port |
| C. | Uniformly Terminating port |
| D. | Unshielded T-connector port |
| Answer» B. Ubiquitious Teflon port | |
| 19. |
Which of the following is possible in a token passing bus network ? |
| A. | in-service expansion |
| B. | unlimited number of stations |
| C. | both (a) and (b) |
| D. | unlimited distance |
| Answer» B. unlimited number of stations | |
| 20. |
Start and stop bits are used in serial communication for |
| A. | error detection |
| B. | error correction |
| C. | synchronization |
| D. | slowing down the communication |
| Answer» D. slowing down the communication | |
| 21. |
Which of the following program is used to copy files to or from another using time sharing system over a single link ? |
| A. | VMTP |
| B. | TFTP |
| C. | UUCP |
| D. | UART |
| Answer» D. UART | |
| 22. |
Slotted ALOHA |
| A. | divide time into discrete intervals |
| B. | require global time synchronization |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 23. |
Working of the WAH generally involves |
| A. | telephone lines |
| B. | micro waves |
| C. | satellites |
| D. | All of these |
| Answer» E. | |
| 24. |
A station in a network forward incoming packets by placing them on its shortest output queue. What routing algorithm is being used ? |
| A. | Hot potato routing |
| B. | Floding |
| C. | Static routing |
| D. | Delta routing |
| Answer» B. Floding | |
| 25. |
Four bits are used for packed sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size ? |
| A. | 4 |
| B. | 8 |
| C. | 15 |
| D. | 16 |
| Answer» D. 16 | |
| 26. |
Which of the following digits are known as the terminal number of the network user address |
| A. | 5-7 |
| B. | 1-4 |
| C. | 8-12 |
| D. | 13-14 |
| Answer» D. 13-14 | |
| 27. |
Which of the following digits are known as the area code of the network user address (NUA) ? |
| A. | 5-7 |
| B. | 1-4 |
| C. | 8-12 |
| D. | 13-14 |
| Answer» B. 1-4 | |
| 28. |
How many digits of the DNICC (Data Network Identiication Code) identify the country ? |
| A. | First three |
| B. | First four |
| C. | First five |
| D. | First six |
| Answer» B. First four | |
| 29. |
Establishing a virtual connection is virtually equivalent to |
| A. | connecting as virtual memory |
| B. | physically connecting a DTE and DCE |
| C. | placing a telephone call prior to a conversion |
| D. | placing a modem prior to a conversion |
| Answer» D. placing a modem prior to a conversion | |
| 30. |
It is desired to send a sequence of computer screen images over an optical fiber. The screen is 480 x 640 pixels, each pixel being 24 bits. There are 60 screen images per second. How much bandwidth is needed, and how many microns of wavelenth are needed for this band at 1.30 microns? |
| A. | 1.0 x 105 microns |
| B. | 2 x 105 microns |
| C. | 2.5 x 105 microns |
| D. | 5 x 105 microns |
| Answer» D. 5 x 105 microns | |
| 31. |
How many digits of the network user Address are known as the DNIC (Data Network Identiication Code) ? |
| A. | First three |
| B. | First four |
| C. | First five |
| D. | First seven |
| Answer» C. First five | |
| 32. |
To interface a computer terminal with a modem, required physical layer standard is |
| A. | RS 424 - A |
| B. | RS 232 - C |
| C. | RS 449 |
| D. | Either (b) or (c) |
| Answer» E. | |
| 33. |
How much bandwith is there in 0.1 micron of spectrum at a wavelength of 1 micron ? |
| A. | 20,000 GHz |
| B. | 25,000 GHz |
| C. | 30,000 GHz |
| D. | None of these |
| Answer» D. None of these | |
| 34. |
A 100 km long cable runs at the T1 data rate. The propagation speed in the cable is half the speed of light. How many bits is in the cable ? |
| A. | 572 |
| B. | 672 |
| C. | 772 |
| D. | 873 |
| Answer» D. 873 | |
| 35. |
If a network designer wants to connect 5 routers as point-to-point simplex line, then total number of lines required would be |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 32 |
| Answer» C. 20 | |
| 36. |
In which circuit switching, delivery of data is delayed because data must be stored and retrieved from RAM |
| A. | space-division |
| B. | time-division |
| C. | virtual |
| D. | packet |
| Answer» C. virtual | |
| 37. |
Which of the following uses an 8B/6T encoding scheme? |
| A. | 100 Base-TX |
| B. | 100 Base-FX |
| C. | 100 Base-T4 |
| D. | 100 Base-T1 |
| Answer» D. 100 Base-T1 | |
| 38. |
IBM's Token-Ring network uses |
| A. | adaptive routing |
| B. | source routing |
| C. | alternative routing |
| D. | spanned tree routing |
| Answer» B. source routing | |
| 39. |
Which of the given below houses the switches in Token Ring ? |
| A. | NIC |
| B. | MAU |
| C. | Nine-pin connector |
| D. | Transceiver |
| Answer» C. Nine-pin connector | |
| 40. |
Ether LAN uses |
| A. | polar encoding |
| B. | diferential manchester encoding |
| C. | manchester encoding |
| D. | NRZ |
| Answer» D. NRZ | |
| 41. |
What can happen at a Token Ring station |
| A. | Examination of the destination address |
| B. | Regeneration of the frame |
| C. | Passing of the frame to the next station |
| D. | All of these |
| Answer» E. | |
| 42. |
In Token Ring, when a frame reaches its destination station, then |
| A. | message is copied |
| B. | four bits in the packet are changed |
| C. | message is taken of the ring and replaced by the token |
| D. | both (a) and (b) |
| Answer» E. | |
| 43. |
The station-to-hub distance in which of the following is 2000 meters ? |
| A. | 100 Base-TX |
| B. | 100 Base-FX |
| C. | 100 Base - T4 |
| D. | 100 Base - T1 |
| Answer» C. 100 Base - T4 | |
| 44. |
Which of the following is not a transceiver function? |
| A. | Transmission and receipt of data |
| B. | Checking of line voltages |
| C. | Addition and subtraction of headers |
| D. | Collision detection |
| Answer» D. Collision detection | |
| 45. |
The monitor station in what standard ensures that one and only one token is circulating ? |
| A. | 802.3 |
| B. | 802.5 |
| C. | Both (a) and (b) |
| D. | All of these |
| Answer» C. Both (a) and (b) | |
| 46. |
Bit stuffing refers to |
| A. | inserting a '0' in user stream to differentiate it with a lag |
| B. | inserting a '0' in lag stream to avoid ambiguity |
| C. | appending a nibble to the lag sequence |
| D. | appending a nibble to the use data stream |
| Answer» B. inserting a '0' in lag stream to avoid ambiguity | |
| 47. |
In which communication, poll/select method used to determine control of the line ? |
| A. | peer-to-peer |
| B. | peer-to-primary |
| C. | primary-to-peer |
| D. | primary-to-secondary |
| Answer» E. | |
| 48. |
Which of the following access control methods is probabilstic ? |
| A. | Polling |
| B. | Contention |
| C. | Token passing |
| D. | Sliding window |
| Answer» E. | |
| 49. |
In stop-and-wait ARQ, if data 1 has an error, then receiver sends which frame ? |
| A. | NAK 0 |
| B. | NAK 1 |
| C. | NAK 2 |
| D. | NAK |
| Answer» E. | |
| 50. |
Minimum number of bits required to represent B is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |