Deck 10: WWAN - Wireless Wide Area Networks

Question 1

Of the following types of satellite, which travels at the highest orbital speed?

A) LEO
B) GEO
C) HEO
D) MEO

Answer 1

A

Question 2

In addition to MIMO, what enables HSPA+ to achieve data rates of up to 42 Mbps?

A) AAS
B) HARQ
C) backhauling
D) spatial multiplexing

Answer 2

D

Question 3

What is a femtocell?

A) a very large cellular area
B) a small cell supported by LTE Advanced
C) a GPRS cell
D) a transmission technique used with OFDM

Answer 3

B

Question 4

What is the component of a cellular network that connects a base station with a wired telephone network?

A) transmitter
B) cellular phone
C) MTSO
D) CDMA

Question 5

Second Generation (2G) systems use digital instead of analog transmissions.

Question 6

Control information is transmitted as __________ by the __________.

A) individual frames; MTSO
B) unicasts; MTSO
C) TDMA packets; base station
D) broadcasts; base station

Question 7

Of the following types of satellites, which typically has the longest lifespan?

A) LEO
B) MEO
C) Big LEO
D) HEO

Question 8

Of the following types of satellite, which has the smallest signal footprint?

A) HEO
B) MEO
C) LEO
D) GEO

Question 9

Division by frequency, so that each caller is allocated part of the spectrum for all of the time, is the basis of TDMA.

Question 10

What is it called when a user begins moving toward another cell and the cellular phone automatically associates with the base station of that cell?

A) roaming
B) handoff
C) hunting
D) multiplexing

Question 11

First Generation (1G) technology is based on Advanced Mobile Phone Service (AMPS).

Question 12

Why are some GEO satellites not usually used for transmitting TCP/IP information?

A) They cannot transmit a strong enough signal.
B) Their transmissions do not have a large enough footprint.
C) They only transmit point-to-point.
D) The round-trip delay of 250 milliseconds causes protocol problems.

Question 13

What is the name given to the special frequency that a cellular phone and base station use for exchanging call-setup information?

A) W-CDMA
B) cell tunnel
C) control channel
D) GB line

Question 14

What is the main advantage of transmitting voice calls using packet switching vs. circuit switching?

A) There is no advantage; voice must always be transmitted using circuit-switching.
B) Call setup is faster using packet switching.
C) The amount of bandwidth used is much larger with packet switching.
D) The voice call does not tie up the channel 100 percent of the time using packet switching.

Question 15

There are two technologies that are used with 2G: W-CDMA and CDMA2000.

Question 16

Which of the following cellular technologies supports MIMO?

A) CDMA
B) AMPS
C) LTE
D) EDGE

Question 17

What is the purpose of the SID on a cellular phone or SIM card?

A) to identify the user
B) to identify the carrier
C) to identify the phone
D) to identify the area in which the user is located

Question 18

The primary difference between 2G and 2.5G networks is that 2.5G networks transmit data using _______.

A) packets
B) capsules
C) DTR
D) FDMA

Question 19

When does roaming occur in cellular telephony?

A) when a user is outside her home
B) when a user connects to another carrier in her home area
C) when a user is away from her home area
D) when a user turns off her cellular phone

Question 20

Which of the following is not a valid cellular telephone code?

A) system identification code (SID)
B) electronic serial number (ESN)
C) digital serial code (DSC)
D) mobile identification number (MIN)