Computer Networking – Wireless Networks and Mobile IP MCQs

This Portion of Computer Networking contains Computer Networking Wireless Networks and Mobile IP MCQs (Multiple Choice Questions and Answers).

This Section covers below lists of topics.

1 WIRELESS LANs
• Introduction
• IEEE802.il Project
• Bluetooth
• WiMAX

2 OTHER WIRELESS NETWORKS
• Channelization
• Cellular Telephony
• Satellite Networks

3 MOBILE IP
• Addressing
• Agents
• Three Phases
• Inefficiency in Mobile IP

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

1. In IEEE 802.11, distributed coordination function (DCF) uses _______ as the access method.

• CSMA/CA
• CSMA/CD
• ALOHA
• None of the choices are correct.

A. CSMA/CA

2. In IEEE 802.11, when a frame is going from one station in a BSS to another station in the same BSS, the address flag is _____

• 00
• 01
• 10
• 11

A. 00

3. In IEEE 802.11, when a frame is coming from an AP and going to a station, the address flag is _______.

• 00
• 01
• 10
• 11

B. 01

4. In IEEE 802.11, when a frame is going from a station to an AP, the address flag is _____.

• 00
• 01
• 10
• 11

C. 10

5. In IEEE 802.11, when a frame is going from one AP to another AP in a wireless distribution system, the address flag is _____

• 00
• 01
• 10
• 11

D. 11

6. In IEEE 802.11, the access method used in the PCF sublayer is ______.

• contention
• controlled
• polling
• None of the choices are correct.

C. polling

7. In IEEE 802.11, the ______ is a time period used for collision avoidance.

• NAV
• BSS
• ESS
• None of the choices are correct.

A. NAV

8. In IEEE 802.11, the addressing mechanism can include up to ______ addresses.

• four
• five
• six
• None of the choices are Correct.

A. four

9. The original IEEE 802.11, uses _________.

• FHSS
• DSSS
• OFDM
• either FHSS or DSSS

D. either FHSS or DSSS

10. The IEEE 802.11a, uses _________.

• FHSS
• DSSS
• OFDM
• either FHSS or DSSS

C. OFDM

11. The IEEE 802.11b, uses _________.

• FHSS
• DSSS
• OFDM
• either FHSS or DSSS

B. DSSS

12. The IEEE 802.11g, uses _________.

• FHSS
• DSSS
• OFDM
• either FHSS or DSSS

C. OFDM

13. The IEEE 802.11 FHSS uses ______ modulation.

• ASK
• FSK
• PSK
• None of the choices are Correct.

B. FSK

14. The IEEE 802.11 or IEEE 802.11b DSSS uses ______ modulation.

• ASK
• FSK
• PSK
• None of the choices are Correct.

C. PSK

15. The IEEE 802.11a, IEEE 802.11g, or IEEE 802.11n OFDM uses ______ modulation.

• ASK
• FSK
• PSK
• None of the choices are Correct.

D. None of the choices are Correct.

16. Bluetooth is a _______ technology that connects devices (called gadgets) in a small area.

• wired LAN
• wireless LAN
• VLAN
• None of the choices are correct.

B. wireless LAN

17. In Bluetooth, multiple ________ form a network called a _________.

• scatternet; piconets
• piconets: scatternet
• piconets: bluenet
• bluenet; scatternet

B. piconets: scatternet

18. A Bluetooth network consists of _____ primary device(s) and up to ____ secondary devices.

• one; five
• five; three
• two; six
• one; seven

D. one; seven

19. In Bluetooth, the current data rate is ____ Mbps

• 2
• 5
• 11
• None of the choices are correct.

D. None of the choices are correct.

20. The access method in Bluetooth is ________.

• FDMA
• TDD-TDMA
• CDMA
• None of the choices are correct.

B. TDD-TDMA

21. In Bluetooth, the _____ link is used when data integrity is more important than avoiding latency.

• SCO
• ACL
• ACO
• SCL

B. ACL

22. Bluetooth uses ______ in the physical layer to avoid interference from other devices or other networks.

• DSSS
• FHSS
• FDMA
• None of the choices are correct.

B. FHSS

23. Channelization (or channel partition as sometime called) is a multiple-access method in which the available bandwidth of a link is shared _________ between different stations.

• in time
• in frequency
• through code
• All of the choices are correct.

D. All of the choices are correct.

24. In ______ the available bandwidth is divided into frequency bands. Each station is allocated a band to send its data. In other words, each band is reserved for a specific station, and it belongs to the station all the time.

• FDMA
• TDMA
• CDMA
• None of the choices are correct.

A. FDMA

25. In ______ the stations share the bandwidth of the channel in time. Each station is allocated a time slot during which it can send data. Each station transmits its data in is assigned time slot..

• FDMA
• TDMA
• CDMA
• None of the choices are correct.

B. TDMA

26. In ______ each station is assigned a code; using a special coding scheme stations send data over the entire bandwidth of the channel without having to share the capacity of the channel in frequency or in time with other stations.

• FDMA
• TDMA
• CDMA
• None of the choices are correct.

C. CDMA

27. _______ is a first-generation cellular phone system.

• AMPS
• D-AMPS
• GSM
• None of the choices are correct.

A. AMPS

28. __________ is a second-generation cellular phone system.

• AMPS
• D-AMPS
• GSM
• None of the choices are correct.

B. D-AMPS

29. ____________ is a digital version of AMPS.

• GSM
• D-AMPS
• IS-95
• None of the choices are correct.

B. D-AMPS

30. ___________ is a second-generation cellular phone system used in Europe.

• GSM
• D-AMPS
• IS-95
• None of the choices are correct.

A. GSM

31. ________ is a second-generation cellular phone system based on CDMA and DSSS.

• GSM
• D-AMPS
• IS-95
• None of the choices are correct.

C. IS-95

32. The __________ cellular phone system provided universal personal communication.

• first-generation
• second-generation
• third-generation
• None of the choices are correct.

C. third-generation

33. In a ______ handoff, a mobile station only communicates with one base station.

• hard
• soft
• medium
• none of the choices are correct

A. hard

34. In a ______ handoff, a mobile station can communicate with two base stations at the same time.

• hard
• soft
• medium
• none of the choices are correct

B. soft

35. In AMPS, each band is divided into ______ channels.

• 800
• 900
• 1000
• None of the choices are correct.

D. None of the choices are correct.

36. AMPS has a frequency reuse factor of _______

• 1
• 3
• 5
• 7

D. 7

37. AMPS uses ______ to divide each 25-MHz band into channels.

• FDMA
• TDMA
• CDMA
• None of the choices are correct.

A. FDMA

38. GSM allows a reuse factor of _______.

• 1
• 3
• 5
• 7

B. 3

39. IS-95 uses the ISM _______ band.

• 800-MHz
• 900-MHz
• 1900-MHz
• either 800-MHZ or 1900-MHZ

D. either 800-MHZ or 1900-MHZ

40. IS-95 uses the _______ satellite system for synchronization.

• GPS
• Teledesic
• Iridium
• none of the choices are correct

A. GPS

41. In an IS-95 system, the frequency-reuse factor is normally _____.

• 1
• 3
• 5
• 7

A. 1

42. In the third generation of cellular phones, _______ uses W-CDMA.

• IMT-DS
• IMT-MC
• IMT-TC
• IMT-SC

A. IMT-DS

43. In the third generation of cellular phones, ______ uses a combination of W-CDMA and TDMA.

• IMT-DS
• IMT-MC
• IMT-TC
• IMT-SC

C. IMT-TC

44. In the third generation of cellular phones, _______ uses only TDMA.

• IMT-DS
• IMT-MC
• IMT-TC
• IMT-SC

D. IMT-SC

45. To increase efficiency, capacity and scalability, new access techniques are being considered such as _______ considered for 4G cellular phones.

• OFDMA
• IFDMA
• MC-CDMA
• All choices are correct

D. All choices are correct

46. The fourth generation cellular phones uses a _____________.

• hardware-defined radio
• software-defined radio
• hardware- and software-defined radio
• None of choices are correct.

B. software-defined radio

47. The fourth generation cellular phones uses _____________ antenna.

• MIMO
• MU-MIMO
• MIMO and MU-MIMO
• None of choices are correct.

C. MIMO and MU-MIMO

48. WiMax is an IEEE standard for a ________ wireless system

• fixed
• mobile
• both fixed and mobile
• None of choices are correct.

C. both fixed and mobile

49. WiMax aims to

• replace WiFi
• compete with WiFi
• provide the "last mile" broadband wireless access alternative to cable and DSL
• None of choices are correct.

C. provide the "last mile" broadband wireless access alternative to cable and DSL

50. The period of a satellite, the time required for a satellite to make a complete trip around the Earth, is determined by _________ law.

• Kepler's
• Newton's
• Ohm's
• None of the choices are correct.

A. Kepler's

51. The signal from a satellite is normally aimed at a specific area called the _________.

• path
• effect
• footprint
• None of the choices are correct.

C. footprint

52. There is (are) _____ orbit(s) for a GEO satellite.

• one
• two
• three
• None of the choices are correct.

A. one

53. ______ is based on a principle called trilateration.

• GPS
• Teledesic
• Iridium
• None of the choices are correct.

A. GPS

54. Low-Earth-orbit (LEO) satellites have _____ orbits.

• equatorial
• polar
• inclined
• None of the choices are correct.

B. polar

55. A GEO have ________ orbit and revolves in phase with Earth.

• equatorial
• polar
• inclined
• None of the choices are correct.

A. equatorial

56. GPS satellites are ________ satellites.

• GEO
• MEO
• LEO
• None of the choices are correct.

B. MEO

57. ________ satellites provide time and location information for vehicles and ships.

• GPS
• Iridium
• Teledesic
• None of the choices are correct.

A. GPS

58. To solve the network addressing problem, a mobile host _____________________.

• uses DHCP to change its address as it goes to a new network
• uses two addresses: the home address, and the care-of address.
• borrows an address from the foreign network
• None of the choices are correct.

B. uses two addresses: the home address, and the care-of address.

59. For agent solicitation, Mobile IP uses _________________________.

• a new packet type
• solicitation packet of IP
• solicitation packet of TCP
• the router solicitation packet of ICMP

D. the router solicitation packet of ICMP

60. A registration request or reply is sent by _____ using the well-known port 434.

• UDP
• TCP
• UDP or TCP
• None of the choices are correct.

A. UDP

61. Which of the following statements about wired and wireless LANs is correct?

• Both operate in the lower two layers of the TCP/IP protocol suite.
• Wired LANs operate in the lower two layers and wireless LANs operate in the lower three layers of the TCP/IP protocol suite.
• Wired LANs operate in the lower three layers and wireless LANs operate in the lower two layers of the TCP/IP protocol suite.
• Both operate in the lower three layers of the TCP/IP protocol suite.

A. Both operate in the lower two layers of the TCP/IP protocol suite.

62. IEEE has defined the specifications for a wireless LAN, called _______, which covers the physical and data link layers.

• IEEE 802.3
• IEEE 802.5
• IEEE 802.11
• IEEE 802.2

C. IEEE 802.11

63. The CSMA/CD algorithm does not work in wireless LAN because

• wireless host does not have enough power to work in s duplex mode.
• of the hidden station problem.
• signal fading could prevent a station at one end from hearing a collision at the other end.
• All of the choices are correct.

D. All of the choices are correct.

64. In IEEE 802.11, a ___ is made of stationary or mobile wireless stations and an optional central base station, known as the access point (AP).

• ESS
• BSS
• CSS
• None of the choices are correct.

B. BSS

65. In IEEE 802.11, a BSS without an AP is called _________.

• an ad hoc architecture
• an infrastructure network
• either an ad hoc architecture or an infrastructure network
• None of the choices are correct.

A. an ad hoc architecture

66. In IEEE 802.11, a BSS with an AP is sometimes referred to as ____________.

• an ad hoc architecture
• an infrastructure network
• either an ad hoc architecture or an infrastructure network
• None of the choices are correct.

B. an infrastructure network

67. In IEEE 802.11, communication between two stations in two different BSSs usually occurs via two ________.

• BSSs
• ESSs
• APs
• None of the choices are correct.

C. APs

68. In IEEE 802.11, a station with ________ mobility is either stationary (not moving) or moving only inside a BSS.

• no-transition
• BSS-transition
• ESS-transition
• None of the choices are correct.

A. no-transition

69. In IEEE 802.11, a station with ________ mobility can move from one BSS to another, but the movement is confined inside one ESS.

• no-transition
• BSS-transition
• ESS-transition
• None of the choices are correct.

B. BSS-transition

70. In IEEE 802.11, a station with ________ mobility can move from one ESS to another.

• no-transition
• BSS-transition
• ESS-transition
• None of the choices are correct.

C. ESS-transition