Deck 9: WMAN - Wireless Metropolitan Area Networks

Question 1

The technique that treats the entire transmission medium as if it were only one channel is called _____.

A) broadband
B) analog
C) baseband
D) line

Answer 1

C

Question 2

Devices in a WiMAX network must transmit in half-duplex only.

Answer 2

False

Question 3

What system, sometimes called fiberless optical, uses low-powered infrared beams instead of fiber-optic cable?

A) MMDS
B) LMDS
C) FSO
D) WiMAX

Answer 3

C

Question 4

One of the limitations of LMDS and MMDS is that both these systems operate at frequencies that require line of sight.

Question 5

A leased special high-speed connection from the local telephone carrier for business users that transmits at 1.544 Mbps is called _____.

A) T1
B) T3
C) DSL
D) Ethernet

Question 6

The maximum distance for a local multipoint distribution service (LMDS) network is ______ miles.

A) 2
B) 5
C) 8
D) 35

Question 7

Non-line-of-sight transmissions in the 802.16 standard can only be supported in the 2-11 GHz bands.

Question 8

In the uplink direction, 802.16 transmits using _____.

A) TDMA
B) half-duplex only
C) TDM
D) the downlink frame

Question 9

The term "fixed wireless" is generally used to refer to _____.

A) buildings
B) cars
C) satellites
D) cell phones

Question 10

What is the common name for connections that begin at a service provider, go through the local neighborhood, and end at the home or office?

A) 1 mile
B) last mile
C) ISP
D) link

Question 11

WirelessHUMAN is used in the ______ band.

A) U-NII
B) 2-11 GHz
C) 10-66 GHz
D) none of the above

Question 12

WiMAX network coverage is typically measured in ________.

A) miles or kilometers
B) feet
C) hundreds of feet
D) meters only

Question 13

What key factor outlines how WiMAX maximizes the use of the frequency bands?

A) better error correction
B) more frequency stability
C) multiple frequency bands
D) adaptive modulation

Question 14

Over short distances, WiMAX can communicate at speeds of up to ____ in the 10-66 GHz bands.

A) 100 Mbps
B) 70 Mbps
C) 120 Mbps
D) 30 Mbps

Question 15

How does the BS send information to the SSs about which modulations will be used for a particular burst or transmission?

A) in the header of the frames
B) in a burst profile
C) in a system profile
D) in the MAC frame

Question 16

The convergence sublayers in the WiMAX MAC protocol allow it to support ______.

A) T1
B) ATM
C) voice and video
D) all of the above

Question 17

A single WiMAX base station can communicate with _____ of subscriber stations simultaneously.

A) dozens
B) thousands
C) hundreds
D) millions

Question 18

LMDS has an advantage over MMDS in that the signals can travel up to 35 miles from the transmitter.

Question 19

The WiMAX base station controls all transmissions in a WiMAX network.

Question 20

Which of the following is not an example of a last mile connection for home users?

A) satellite
B) dial-up modem
C) DSL
D) baseband