Question 1

The most widely used 802.11 standard today is ________.

Accepted Answer

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

Question 2

An 802.11g access point has an actual speed of 30 MHz.This is ________.

Accepted Answer

A) the rated speed 
B) aggregate throughput 
C) channel bandwidth 
A) the rated speed 
B) aggregate throughput 
C) channel bandwidth

Question 3

Spread spectrum transmission is used in commercial WLANs for security reasons.

Accepted Answer

A) True 
 B)False

Question 4

Channels with wide bandwidths are called ________ channels.

Accepted Answer

A) single-mode 
B) multimode 
C) full-duplex 
D) broadband 
E) modulated 
A) single-mode 
B) multimode 
C) full-duplex 
D) broadband 
E) modulated

Question 5

802.11n is faster than 802.11g because 802.11n ________

Accepted Answer

A) is designed to use wider channels 
B) can send multiple signals (spatial transmission speeds)in a single channel 
C) Both A and B 
D) Neither A nor B 
A) is designed to use wider channels 
B) can send multiple signals (spatial transmission speeds)in a single channel 
C) Both A and B 
D) Neither A nor B

Question 6

In the Shannon Equation,C is the ________.

Accepted Answer

A) actual speed of transmission in a channel 
B) maximum possible speed of transmission in a channel 
C) minimum possible speed of transmission in a channel 
D) channel bandwidth 
E) signal-to-noise ratio 
A) actual speed of transmission in a channel 
B) maximum possible speed of transmission in a channel 
C) minimum possible speed of transmission in a channel 
D) channel bandwidth 
E) signal-to-noise ratio

Question 7

Smart antennas can ________.

Accepted Answer

A) direct signal strength at individual wireless hosts 
B) transmit multiple spatial data streams in the same channel 
C) Both A and B 
D) Neither A nor B 
A) direct signal strength at individual wireless hosts 
B) transmit multiple spatial data streams in the same channel 
C) Both A and B 
D) Neither A nor B

Question 8

What happens if two nearby access points use the same channel?

Accepted Answer

A) They will interfere with each other. 
B) They will be bonded for joint operation automatically. 
C) They will be bonded for joint operation automatically if they use CSMA/CA+ACK. 
D) They will be bonded for joint operation automatically if they use RTS/CTS. 
A) They will interfere with each other. 
B) They will be bonded for joint operation automatically. 
C) They will be bonded for joint operation automatically if they use CSMA/CA+ACK. 
D) They will be bonded for joint operation automatically if they use RTS/CTS.

Question 9

The most widely used 802.11 LAN standard today is 802.11n.

Accepted Answer

A) True 
 B)False

Question 10

The most serious problem with wireless transmission in WLANs is ________.

Accepted Answer

A) inverse square law attenuation 
B) absorptive attenuation 
C) shadow zones 
D) multipath interference 
A) inverse square law attenuation 
B) absorptive attenuation 
C) shadow zones 
D) multipath interference

Question 11

In 802.11 WLANs,the terms handoff and roaming mean the same thing.

Accepted Answer

A) True 
 B)False

Question 12

(From the box,"Controlling 802.11 Transmission")CSMA-CA+ACK is reliable.

Accepted Answer

A) True 
 B)False

Question 13

What propagation problem becomes worse as frequency increases?

Accepted Answer

A) Inverse square law attenuation. 
B) Electromagnetic interference. 
C) Both A and B 
D) Neither A nor B 
A) Inverse square law attenuation. 
B) Electromagnetic interference. 
C) Both A and B 
D) Neither A nor B

Question 14

What propagation problem becomes worse as frequency increases?

Accepted Answer

A) Absorptive attenuation. 
B) Shadow zones. 
C) Both A and B 
D) Neither A nor B 
A) Absorptive attenuation. 
B) Shadow zones. 
C) Both A and B 
D) Neither A nor B

Question 15

(From the box,"Controlling 802.11 Transmission")In ________,when a wireless host wishes to send,it first sends a message to the wireless access point asking for permission to send.When the access point sends back a response,the host sending the original message may transmit.All other hosts must wait.

Accepted Answer

A) CSMA/CA+ACK 
B) CSMA/CA 
C) CSMA/CD 
D) RTS/CTS 
A) CSMA/CA+ACK 
B) CSMA/CA 
C) CSMA/CD 
D) RTS/CTS

Question 16

What aspect of 802.11 standards affects interference between nearby access points?

Accepted Answer

A) The number of possible nonoverlapping channels. 
B) The standard's minimum spacing parameter. 
C) RTS/CTS. 
D) All of the above. 
A) The number of possible nonoverlapping channels. 
B) The standard's minimum spacing parameter. 
C) RTS/CTS. 
D) All of the above.

Question 17

The frequency range from 500 megahertz to 10 gigahertz is called the ________.

Accepted Answer

A) frequency spectrum 
B) commercial mobile service band 
C) UWB region 
D) golden zone 
E) unlicensed band 
A) frequency spectrum 
B) commercial mobile service band 
C) UWB region 
D) golden zone 
E) unlicensed band

Question 18

802.11a supports ________ nonoverlapping channels.

Accepted Answer

A) 1 
B) 3 
C) 7 
D) More than 10 
A) 1 
B) 3 
C) 7 
D) More than 10

Question 19

To handle multiple conversations in radio transmission,you use multiple ________.

Accepted Answer

A) channels 
B) frequencies 
C) service bands 
D) UWBs 
E) wires 
A) channels 
B) frequencies 
C) service bands 
D) UWBs 
E) wires

Question 20

(From the box,"Controlling 802.11 Transmission")Which of the following is more efficient?

Accepted Answer

A) CSMA/CA+ACK. 
B) RTS/CTS. 
C) Both are about equally efficient. 
A) CSMA/CA+ACK. 
B) RTS/CTS. 
C) Both are about equally efficient.

The most widely used 802.11 standard today is ________.

An 802.11g access point has an actual speed of 30 MHz.This is ________.

Spread spectrum transmission is used in commercial WLANs for security reasons.

Channels with wide bandwidths are called ________ channels.

802.11n is faster than 802.11g because 802.11n ________

In the Shannon Equation,C is the ________.

Smart antennas can ________.

What happens if two nearby access points use the same channel?

The most widely used 802.11 LAN standard today is 802.11n.

The most serious problem with wireless transmission in WLANs is ________.

In 802.11 WLANs,the terms handoff and roaming mean the same thing.

(From the box,"Controlling 802.11 Transmission")CSMA-CA+ACK is reliable.

What propagation problem becomes worse as frequency increases?

What propagation problem becomes worse as frequency increases?

What aspect of 802.11 standards affects interference between nearby access points?

The frequency range from 500 megahertz to 10 gigahertz is called the ________.

802.11a supports ________ nonoverlapping channels.

To handle multiple conversations in radio transmission,you use multiple ________.

(From the box,"Controlling 802.11 Transmission")Which of the following is more efficient?

Networking: How We Got Here

Network Standards

Network Security

Network Management

Physical Layer Propagation

Switched Wired Networks

Wireless Networks 2

Tcp-Ip Internetworking

Internetworking 2

Networked Applications

More on Tcp-Ip

More on Modulation

More on Telecommunications

Filters

Exam 7: Wireless Networks I

The most widely used 802.11 standard today is ________.

An 802.11g access point has an actual speed of 30 MHz.This is ________.

Spread spectrum transmission is used in commercial WLANs for security reasons.

Channels with wide bandwidths are called ________ channels.

802.11n is faster than 802.11g because 802.11n ________

In the Shannon Equation,C is the ________.

Smart antennas can ________.

What happens if two nearby access points use the same channel?

The most widely used 802.11 LAN standard today is 802.11n.

The most serious problem with wireless transmission in WLANs is ________.

In 802.11 WLANs,the terms handoff and roaming mean the same thing.

(From the box,"Controlling 802.11 Transmission")CSMA-CA+ACK is reliable.

What propagation problem becomes worse as frequency increases?

What propagation problem becomes worse as frequency increases?

What aspect of 802.11 standards affects interference between nearby access points?

The frequency range from 500 megahertz to 10 gigahertz is called the ________.

802.11a supports ________ nonoverlapping channels.

To handle multiple conversations in radio transmission,you use multiple ________.

(From the box,"Controlling 802.11 Transmission")Which of the following is more efficient?

Networking: How We Got Here

Network Standards

Network Security

Network Management

Physical Layer Propagation

Switched Wired Networks

Wireless Networks 2

Tcp-Ip Internetworking

Internetworking 2

Networked Applications

More on Tcp-Ip

More on Modulation

More on Telecommunications

Filters