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
 

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.
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
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
4
. In IEEE 802.11, when a frame is going from a station to an AP, the address flag is _____.
  • 00
  • 01
  • 10
  • 11
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
6
. In IEEE 802.11, the access method used in the PCF sublayer is ______.
  • contention
  • controlled
  • polling
  • None of the choices are correct.
7
. In IEEE 802.11, the ______ is a time period used for collision avoidance.
  • NAV
  • BSS
  • ESS
  • None of the choices are correct.
8
. In IEEE 802.11, the addressing mechanism can include up to ______ addresses.
  • four
  • five
  • six
  • None of the choices are Correct.
9
. The original IEEE 802.11, uses _________.
  • FHSS
  • DSSS
  • OFDM
  • either FHSS or DSSS
10
. The IEEE 802.11a, uses _________.
  • FHSS
  • DSSS
  • OFDM
  • either FHSS or DSSS
11
. The IEEE 802.11b, uses _________.
  • FHSS
  • DSSS
  • OFDM
  • either FHSS or DSSS
12
. The IEEE 802.11g, uses _________.
  • FHSS
  • DSSS
  • OFDM
  • either FHSS or DSSS
13
. The IEEE 802.11 FHSS uses ______ modulation.
  • ASK
  • FSK
  • PSK
  • None of the choices are Correct.
14
. The IEEE 802.11 or IEEE 802.11b DSSS uses ______ modulation.
  • ASK
  • FSK
  • PSK
  • None of the choices are Correct.
15
. The IEEE 802.11a, IEEE 802.11g, or IEEE 802.11n OFDM uses ______ modulation.
  • ASK
  • FSK
  • PSK
  • 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.
17
. In Bluetooth, multiple ________ form a network called a _________.
  • scatternet; piconets
  • piconets: scatternet
  • piconets: bluenet
  • bluenet; scatternet
18
. A Bluetooth network consists of _____ primary device(s) and up to ____ secondary devices.
  • one; five
  • five; three
  • two; six
  • one; seven
19
. In Bluetooth, the current data rate is ____ Mbps
  • 2
  • 5
  • 11
  • None of the choices are correct.
20
. The access method in Bluetooth is ________.
  • FDMA
  • TDD-TDMA
  • CDMA
  • None of the choices are correct.
21
. In Bluetooth, the _____ link is used when data integrity is more important than avoiding latency.
  • SCO
  • ACL
  • ACO
  • SCL
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.
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.
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.
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.
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.
27
. _______ is a first-generation cellular phone system.
  • AMPS
  • D-AMPS
  • GSM
  • None of the choices are correct.
28
. __________ is a second-generation cellular phone system.
  • AMPS
  • D-AMPS
  • GSM
  • None of the choices are correct.
29
. ____________ is a digital version of AMPS.
  • GSM
  • D-AMPS
  • IS-95
  • None of the choices are correct.
30
. ___________ is a second-generation cellular phone system used in Europe.
  • GSM
  • D-AMPS
  • IS-95
  • None of the choices are correct.
31
. ________ is a second-generation cellular phone system based on CDMA and DSSS.
  • GSM
  • D-AMPS
  • IS-95
  • None of the choices are correct.
32
. The __________ cellular phone system provided universal personal communication.
  • first-generation
  • second-generation
  • third-generation
  • None of the choices are correct.
33
. In a ______ handoff, a mobile station only communicates with one base station.
  • hard
  • soft
  • medium
  • none of the choices are correct
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
35
. In AMPS, each band is divided into ______ channels.
  • 800
  • 900
  • 1000
  • None of the choices are correct.
36
. AMPS has a frequency reuse factor of _______
  • 1
  • 3
  • 5
  • 7
37
. AMPS uses ______ to divide each 25-MHz band into channels.
  • FDMA
  • TDMA
  • CDMA
  • None of the choices are correct.
38
. GSM allows a reuse factor of _______.
  • 1
  • 3
  • 5
  • 7
39
. IS-95 uses the ISM _______ band.
  • 800-MHz
  • 900-MHz
  • 1900-MHz
  • either 800-MHZ or 1900-MHZ
40
. IS-95 uses the _______ satellite system for synchronization.
  • GPS
  • Teledesic
  • Iridium
  • none of the choices are correct
41
. In an IS-95 system, the frequency-reuse factor is normally _____.
  • 1
  • 3
  • 5
  • 7
42
. In the third generation of cellular phones, _______ uses W-CDMA.
  • IMT-DS
  • IMT-MC
  • IMT-TC
  • IMT-SC
43
. In the third generation of cellular phones, ______ uses a combination of W-CDMA and TDMA.
  • IMT-DS
  • IMT-MC
  • IMT-TC
  • IMT-SC
44
. In the third generation of cellular phones, _______ uses only TDMA.
  • IMT-DS
  • IMT-MC
  • IMT-TC
  • 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
46
. The fourth generation cellular phones uses a _____________.
  • hardware-defined radio
  • software-defined radio
  • hardware- and software-defined radio
  • None of choices are correct.
47
. The fourth generation cellular phones uses _____________ antenna.
  • MIMO
  • MU-MIMO
  • MIMO and MU-MIMO
  • None of choices are correct.
48
. WiMax is an IEEE standard for a ________ wireless system
  • fixed
  • mobile
  • both fixed and mobile
  • None of choices are correct.
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.
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.
51
. The signal from a satellite is normally aimed at a specific area called the _________.
  • path
  • effect
  • footprint
  • None of the choices are correct.
52
. There is (are) _____ orbit(s) for a GEO satellite.
  • one
  • two
  • three
  • None of the choices are correct.
53
. ______ is based on a principle called trilateration.
  • GPS
  • Teledesic
  • Iridium
  • None of the choices are correct.
54
. Low-Earth-orbit (LEO) satellites have _____ orbits.
  • equatorial
  • polar
  • inclined
  • None of the choices are correct.
55
. A GEO have ________ orbit and revolves in phase with Earth.
  • equatorial
  • polar
  • inclined
  • None of the choices are correct.
56
. GPS satellites are ________ satellites.
  • GEO
  • MEO
  • LEO
  • None of the choices are correct.
57
. ________ satellites provide time and location information for vehicles and ships.
  • GPS
  • Iridium
  • Teledesic
  • None of the choices are correct.
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.
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
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.
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.
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
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.
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.
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.
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.
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.
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.
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.
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.

 
 
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