Deck 8: Wireless Networking

Question 1

Using Bluetooth version 2.0,communicating nodes can be as far as ____ meters apart.

A) 30
B) 100
C) 300
D) 330

Answer 1

A

Question 2

Wireless networks are laid out using the same topologies as wired networks.

Answer 2

False

Question 3

WiMAX is defined by the IEEE 802.11 standard.

Answer 3

False

Question 4

In wireless communication,to exchange information,two antennas must be tuned to the same ____.

A) frequency
B) variance
C) attenuation speed
D) port

Question 5

____ may use either the 2.4-GHz or 5-GHz frequency range.

A) 802.11a
B) 802.11b
C) 802.11g
D) 802.11n

Question 6

____ is a command-line function for viewing and setting wireless interface parameters and it is common to nearly all versions of Linux and UNIX.

A) ipconfig
B) iwconfig
C) config
D) ivconfig

Question 7

In ____,a wireless signal splits into secondary waves when it encounters an obstruction.

A) reflection
B) scattering
C) diffraction
D) bounce back

Question 8

____ is the least popular WLAN standard.

A) 802.11a
B) 802.11b
C) 802.11g
D) 802.11n

Question 9

In ____ wireless systems,the result is a point-to-point link.

A) mobile
B) variable
C) fixed
D) open

Question 10

The average geographic range for an 802.11a antenna is ____ meters.

A) 20
B) 100
C) 330
D) 600

Question 11

An 802.11g antenna has a geographic range of ____ meters.

A) 20
B) 100
C) 300
D) 330

Question 12

____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.

A) Channel bonding
B) Channel aggregation
C) Frame aggregation
D) Frame bonding

Question 13

____ is a most significant problem for wireless communications because the atmosphere is saturated with electromagnetic waves.

A) Attenuation
B) Fading
C) Diffraction
D) Interference

Question 14

A unique characteristic of the 802.11 data frame is its ____ field.

A) Frame Control
B) Sequence Control
C) Data
D) Duration

Question 15

In ____ scanning,the station transmits a special frame,known as a probe,on all available channels within its frequency range.

A) active
B) passive
C) fixed
D) open

Question 16

____ is an 802.11n network feature allowing the combination of multiple frames into one larger frame.

A) Channel bonding
B) Channel aggregation
C) Frame aggregation
D) Frame bonding

Question 17

A directional antenna issues wireless signals along a(n)____ direction.

A) open
B) narrow
C) wide
D) single

Question 18

Wireless signals experience attenuation.

Question 19

Spread spectrum is a popular way of making wireless transmissions more secure.

Question 20

If a station detects the presence of several access points,it will always choose the closest access point.

Question 21

Places where wireless Internet access is available to the public are called ____________________.

Question 22

A(n)____________________ assesses client requirements,facility characteristics,and coverage areas to determine an access point arrangement that will ensure reliable wireless connectivity within a given area.

Question 23

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
Boasts a maximum throughput of 600 Mbps.

Question 24

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
The creation of a communications channel for a transmission from an Earth-based transmitter to an orbiting satellite.

Question 25

Dial return satellite Internet access is a(n)____ technology.

A) symmetrical
B) asymmetrical
C) proprietary
D) open source

Question 26

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
The receiver can be located anywhere within the transmitter's range.

Question 27

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
Uses channels in the 5-GHz band and provides a maximum theoretical throughput of 54 Mbps.

Question 28

____ satellites are the type used by the most popular satellite Internet access service providers.

A) Transponder
B) Medium Earth orbiting
C) Low Earth orbiting
D) Geosynchronous orbiting

Question 29

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
The locations of the transmitter and receiver do not move.

Question 30

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
Transmission from a satellite transponder to an earth-based dish-shaped antenna.

Question 31

LEO satellites orbit the Earth with an altitude as low as ____ miles.

A) 100
B) 1240
C) 6,000
D) 22,300

Question 32

If intermittent and difficult-to-diagnose wireless communication errors occur,____ might be the culprit.

A) incorrect encryption
B) SSID mismatch
C) interference
D) incorrect antenna placement

Question 33

The use of multiple frequencies to transmit a signal is known as ____________________ technology.

Question 34

____________________ means that satellites orbit the Earth at the same rate as the Earth turns.

Question 35

The ______________________________ is a unique character string used to identify an access point.

Question 36

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
Uses the 2.4-GHz frequency band and provides a maximum theoretical throughput of 54 Mbps.

Question 37

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
Accepts wireless signals from multiple nodes and retransmits them to the rest of the network.

Question 38

Satellite return Internet access is a(n)____ technology.

A) symmetrical
B) asymmetrical
C) proprietary
D) open source

Question 39

MATCHING
Match each item with a statement below:
a.mobile wireless
f.802.11b
b.fixed wireless
g.802.11a
c.access point
h.802.11g
d.uplink
i.802.11n
e.downlink
Uses DSSS (direct-sequence spread spectrum)signaling.

Question 40

Satellite Internet access providers typically use frequencies in the C- or ____ bands.

A) L-
B) S-
C) Ku-
D) Ka-

Question 41

Describe what an administrator can do if during a wireless router configuration,something goes awry.

Question 42

Describe the original design intentions for Bluetooth.Follow this with an explanation of why Bluetooth proved to be impractical for business LANs and what the technology supports today.

Question 43

Describe the wireless spectrum.

Question 44

Explain how residential WiMAX is installed.

Question 45

Define and explain the MIMO innovation in the 802.11n standard.Include a description of the advantages it provides.

Question 46

Describe the FHSS and DSSS spread spectrum technologies.

Question 47

Explain how the satellite Internet access service known as a satellite return arrangement works.

Question 48

Describe the use of CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)to access a shared medium.

Question 49

Define reassociation and provide two examples explaining when it occurs.

Question 50

Describe how interference can distort and weaken a wireless signal.