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Exam 8: Wireless Networking

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Question 21

Essay

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

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802.11 standards specify the use of CSMA...

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Question 22

Multiple Choice

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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

E) B) and C)
F) A) and B)

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Question 23

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WiMAX is defined by the IEEE 802.11 standard.

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.

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

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.

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

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

Wireless signals experience attenuation.

Define reassociation and provide two examples explaining when it occurs.

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

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.

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

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

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

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

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

Describe the wireless spectrum.

Explain how residential WiMAX is installed.

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.