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Mixed Quiz
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1

A wireless LAN using FHSS hops 10 times per cycle. If the bandwidth of the original signal is 10 MHz and 2 GHz is the lowest frequency, the highest frequency of the system is _______ GHz.
A)1.0
B)2.0
C)2.1
D)3.0
2

An FHSS wireless LAN has a spread spectrum of 1 GHz. The bandwidth of the original signal is 250 MHz, and there are ______ hops per cycle.
A)4
B)3
C)2
D)1
3

A wireless LAN using FHSS hops 10 times per cycle. If the bandwidth of the original signal is 10 MHz, the spread spectrum is _______ MHz.
A)1000
B)10,000
C)10
D)100
4

A wireless LAN using DSSS with an 8-bit chip code needs _______ MHz for sending data that originally required a 10-MHz bandwidth.
A)20
B)80
C)2
D)8
5

A wireless LAN using DSSS with _______-bit chip code needs 320 MHz for sending data that originally required a 20-MHz bandwidth.
A)A 2
B)A 16
C)A 32
D)An 8
6

A wireless LAN using DSSS with a 4-bit chip code needs 10 MHz for sending data that originally required a _______-MHz bandwidth.
A)20
B)25
C)40
D)2.5
7

In an ESS the _______ station is not mobile.
A)BSS
B)AP
C)Server
D)None of the above
8

In an ESS the _______ stations are part of a wired LAN.
A)BSS
B)AP
C)Server
D)All the above
9

A station with _______ mobility is either stationary or moving only inside a BSS.
A)No-transition
B)BSS
C)ESS
D)(a) and (b)
10

_______ combine to form a scatternet.
A)APs
B)Piconets
C)BSSs
D)ESSs
11

Bluetooth uses _______ in the physical layer.
A)DSSS
B)DHSS
C)FHSS
D)OFDM
12

A _______ frame usually precedes a CTS frame.
A)SIFS
B)RTS
C)DIFS
D)Any of the above
13

A station with _______ mobility can move from one BSS to another.
A)No-transition
B)ESS-transition
C)BSS-transition
D)(b) and (c)
14

A station with _______ mobility can move from one ESS to another.
A)No-transition
B)ESS-transition
C)BSS-transition
D)(b) and (c)
15

A _______ frame usually precedes an RTS frame.
A)DIFS
B)CIFS
C)CTS
D)None of the above
16

Wireless transmission is _______ prone to error than/as wired transmission.
A)Less
B)More
C)Half as
D)None of the above
17

Which MAC sublayer does IEEE 802.11 define?
A)LLC
B)PCF
C)DCF
D)(b) and (c)
18

What is the basic access method for wireless LANs as defined by IEEE 802.11?
A)LLC
B)PCF
C)DCF
D)BFD
19

The access method for wireless LANs as defined by IEEE 802.11 is based on ______.
A)Token passing
B)CSMA
C)CSMA/CD
D)CSMA/CA
20

FHSS, DSSS, and OFDM are _______ layer specifications.
A)Data link
B)Network
C)Physical
D)Transport
21

Stations do not sense the medium during _______ time.
A)SIFS
B)NAV
C)RTS
D)CTS
22

A Bluetooth frame needs _______ µs for hopping and control mechanisms.
A)3
B)625
C)259
D)A multiple of 259
23

In the ______ method, the sender hops from frequency to frequency in a specific order.
A)DSSS
B)FHSS
C)OFDM
D)HR-DSSS
24

A wireless LAN uses _______ frames for acknowledgment.
A)Management
B)Data
C)Control
D)None of the above
25

A wireless LAN uses _______ frames for the initial communication between stations and the access points.
A)Control
B)Data
C)Management
D)None of the above
26

A Bluetooth network can have _______ master(s).
A)One
B)Two
C)Three
D)Eight





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