ESAT Forouzan - Chapter 17: Cellular Telephone and Satellite Networks

Question 1

A ________ is computerized center that is responsible for connecting calls, recording
call information, and billing.
a. base station
b. mobile switching center
c. cell
d. mobile station

Answer 1

b. mobile switching center

Question 2

In _______, a mobile station always communicates with just one base station.
a. roaming
b. a hard handoff
c. a soft handoff
d. a roaming handoff

Answer 2

b. a hard handoff

Question 3

________ is a first generation cellular phone system.
a. AMPS
b. D-AMPS
c. GSM
d. IS-95

Answer 3

a. AMPS

Question 4

________ is a second generation cellular phone system
a. D-AMPS
b. GSM
c. IS-95
d. All of the above

Answer 4

d. All of the above

Question 5

AMPS uses _________ for modulation.
a. FM
b. FSK
c. PM
d. a and b

Answer 5

d. a and b

Question 6

________ separates AMPS voice channels
a. CDMA
b. TDMA
c. FDMA
d. b and c

Answer 6

c. FDMA

Question 7

________ is a cellular telephone system popular in Europe.
a. AMPS
b. D-AMPS
c. GSM
d. IS-95

Answer 7

c. GSM

Question 8

D-AMPS used ________ for multiplexing.
a. CDMA
b. TDMA
c. FDMA
d. b and c

Answer 8

d. b and c

Question 9

GSM uses _________ for multiplexing.
a. CDMA
b. TDMA
c. FDMA
d. b and c

Answer 9

d. b and c

Question 10

DSSS is used by the _______ cellular phone systems.
a. AMPS
b. D-Amps
c. GSM
d. IS-95

Answer 10

d. IS-95

Question 11

________ base stations uses GPS for synchronization.
a. AMPS
b. D-Amps
c. GSM
d. IS-95

Answer 11

d. IS-95

Question 12

IS-95 has a frequency reuse factor of _________.
a. 1
b. 5
c. 7
d. 95

Answer 12

a. 1

Question 13

The path that a satellite makes around the world is called?
a. a period
b. a footprint
c. an orbit
d. an uplink

Answer 13

c. an orbit

Question 14

A GEO satellite has _______ orbit.
a. an equatorial
b. a polar
c. an inclined
d. an equilateral

Answer 14

a. an equatorial

Question 15

The signal from a satellite is aimed at a specific area called the __________.
a. period
b. footprint
c. orbit
d. uplink

Answer 15

b. footprint

Question 16

Which orbit has the highest altitude?
a. GEO
b. MEO
c. LEO
d. HEO

Answer 16

a. GEO

Question 17

MEO satellites orbit _______ Van Allen belts.
a. in the
b. between the
c. above both
d. below both

Answer 17

b. between the

Question 18

Transmission from the earth to the satellite is called _________.
a. footlink
b. up print
c. downlink
d. uplink

Answer 18

d. uplink

Question 19

The __________ is not used for voice communication
a. IS-95 system
b. Globalstar system
c. GPS
d. Iridium system

Answer 19

c. GPS

Question 20

_________ is often used for navigation purposes.
a. AMPS
b. IS-95
c. Iridium
d. GPS

Answer 20

d. GPS

Question 21

A LEO satellite has ________ orbit.
a. an equatorial
b. an inclined
c. a polar
d. all of the above

Answer 21

c. a polar

Question 22

Teledesic is a _________ LEO satellite system
a. little
b. big
c. passband
d. broadband

Answer 22

d. broadband

Question 23

__________ has 66 satellites in six LEOs.
a. Globalstar
b. Iridium
c. Teledesic
d. GPS

Answer 23

b. Iridium

Question 24

__________ has 48 satellites in six polar orbits.
a. Globastar
b. Iridium
c. Teledesic
d. GPS

Answer 24

a. Globastar

Question 25

__________ will have 288 satellites in 12 polar orbits.
a. Globalstar
b. Iridium
c. Teledesic
d. GPS

Answer 25

c. Teledesic