Deck 8: Wireless Networking

Question 1

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

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

Answer 1

C

Question 2

In the case of connecting two WLANs, access points could be as far as ____ feet apart.

A) 500
B) 800
C) 1000
D) 1200

Answer 2

C

Question 3

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

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

Answer 3

D

Question 4

Wireless signals experience attenuation.

Question 5

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

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

Question 6

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 7

____ 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 8

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

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

Question 9

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

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

Question 10

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

Question 11

____ 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 12

____ is the least popular WLAN standard.

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

Question 13

WiMAX is defined by the IEEE 802.11 standard.

Question 14

____ 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 15

An ad hoc arrangement would work well for a WLAN with many users.

Question 16

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

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

Question 17

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

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

Question 18

In ____ wireless systems, the transmitting antenna focuses its energy directly toward the receiving antenna which results in a point-to-point link.

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

Question 19

____ 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 20

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

Question 21

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

Question 22

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

Question 23

Which satellites transmit and receive signals in the 12 to 18 GHz band?

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

Question 24

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

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

Question 25

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

Question 26

Most satellites circle the Earth ____ miles above the equator in a geosynchronous orbit.

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

Question 27

Describe the wireless spectrum.

Question 28

Describe the FHSS and DSSS spread spectrum technologies.

Question 29

Discuss what must be taken into account when placing an access point on a WLAN.

Question 30

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

Question 31

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 32

Describe how interference can distort and weaken a wireless signal.

Question 33

List and describe the three groups into which frame types are divided.

Question 34

To establish a satellite Internet connection, each subscriber must have a ____.

A) dish antenna
B) line-of-sight antenna
C) dish pathway
D) source pathway

Question 35

Clients are able to exchange signals with satellites as long as they have a ____ path.

A) view
B) line-of-sight
C) proprietary
D) directional

Question 36

Define reassociation and provide two examples explaining when it occurs.

Question 37

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

Question 38

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 39

What is the purpose of the Frame Control field in an 802.11 frame?

Question 40

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