Question 1

In FHSS, the amount of time needed to move from one frequency to another is the ____ time.

Accepted Answer

A)  dwell 
B)  switch 
C)  lift 
D)  hop 
A)  dwell 
B)  switch 
C)  lift 
D)  hop D

Question 2

The value of layers in the OSI reference model is that it divides networking into a series of tasks, and then illustrates how those tasks relate to each other.

Accepted Answer

A) True 
 B)False  True

Question 3

Narrowband transmissions require significant power for the signal to be transmitted because the signal must exceed the ____________________, or the total amount of outside interference, by a substantial margin.

Accepted Answer

noise level

Question 4

The 802.11g standard outlines two mandatory modes along with one optional mode. Describe each mode.

Accepted Answer

The first mandatory mode is the same CCK

Question 5

What is the Open Systems Interconnection (OSI) reference model?

Accepted Answer

The model breaks network communication i

Question 6

What are the advantages to using DSSS with a chipping code?

Accepted Answer

Error correction-If there is interferenc

Question 7

What is a disadvantage of narrowband transmissions?

Accepted Answer

A disadvantage of narrowband transmissio

Question 8

What are disadvantages of the 802.11g standard?

Accepted Answer

First, the number of channels available

Question 9

How does OFDM work?

Accepted Answer

A)  signals are broken up and the parts are sent in parallel 
B)  the same signal is sent on multiple channels 
C)  one signal is sent twice on the same channel 
D)  a signal is sent over a wired network at the same time as the wireless network 
A)  signals are broken up and the parts are sent in parallel 
B)  the same signal is sent on multiple channels 
C)  one signal is sent twice on the same channel 
D)  a signal is sent over a wired network at the same time as the wireless network

Question 10

____ signals by nature transmit on only one frequency or a very narrow portion of the frequencies.

Accepted Answer

A)  Broadband 
B)  Computer 
C)  Radio 
D)  Heat 
A)  Broadband 
B)  Computer 
C)  Radio 
D)  Heat

Question 11

What techniques are used by vendors to achieve 2x mode for transmissions?

Accepted Answer

A)  combine two frequency channels 
B)  use different coding rate schemes 
C)  reallocating the individual carriers 
D)  All of the above 
A)  combine two frequency channels 
B)  use different coding rate schemes 
C)  reallocating the individual carriers 
D)  All of the above

Question 12

Of the 52 subchannels, 32 are used for standard transmissions and 20 are used for FEC transmissions.

Accepted Answer

A) True 
 B)False

Question 13

When transmitting with FHSS, if interference is encountered on a particular frequency then that part of the signal will be retransmitted on the previous frequency of the hopping code.

Accepted Answer

A) True 
 B)False

Question 14

Describe the FCC restrictions on FHSS.

Accepted Answer

The FCC has established restrictions on

Question 15

Match between columns
                        Premises: two channels are combined (one for sending data and the other for receiving) to provide the necessary frequency for the higher speeds
transmits a secondary copy along with the primary information
sends signals to the network or receives signals from the network
uses an expanded redundant code to transmit each data bit
can double the amount of data encoded over PSK to 250 Kbps per channel, which produces a 12 Mbps (250 Kbps x 48) data rate
picks the route packets take and handles addressing of packets for delivery
uses a range of frequencies that change during the transmission
ensures that error-free data is given to the user
sending multiple signals at the same time

Accepted Answer

The Answer of physical layer and transport layer and network is...

Question 16

Although 54 Mbps is the "official" top speed of 802.11a, the IEEE specification also allows for higher speeds. These higher speeds are known as ____________________ mode or 2X mode.

Accepted Answer

The answer of Although 54 Mbps is the "official" top...

Question 17

Increasing the speed of the WLAN will cause shorter delays in waiting for reflections.

Accepted Answer

A) True 
 B)False

Question 18

When using the Shared Wireless Access Protocol, devices can be as far as 45 meters (150 feet) apart and can send and receive data at rates up to ____ Mbps.

Accepted Answer

A)  2 
B)  5 
C)  10 
D)  14 
A)  2 
B)  5 
C)  10 
D)  14

Question 19

The Physical Layer Convergence Procedure (PLCP) standards for 802.11b are based on ____.

Accepted Answer

A)  DSSS 
B)  FHSS 
C)  OFDM 
D)  PYS 
A)  DSSS 
B)  FHSS 
C)  OFDM 
D)  PYS

Question 20

IEEE has divided the ____ layer into two sublayers: Logical Link Control (LLC) and Media Access Control (MAC).

Accepted Answer

A)  Physical 
B)  Data Link 
C)  Transport 
D)  Session 
A)  Physical 
B)  Data Link 
C)  Transport 
D)  Session

In FHSS, the amount of time needed to move from one frequency to another is the ____ time.

The value of layers in the OSI reference model is that it divides networking into a series of tasks, and then illustrates how those tasks relate to each other.

Narrowband transmissions require significant power for the signal to be transmitted because the signal must exceed the ____________________, or the total amount of outside interference, by a substantial margin.

The 802.11g standard outlines two mandatory modes along with one optional mode. Describe each mode.

What is the Open Systems Interconnection (OSI) reference model?

What are the advantages to using DSSS with a chipping code?

What is a disadvantage of narrowband transmissions?

What are disadvantages of the 802.11g standard?

How does OFDM work?

____ signals by nature transmit on only one frequency or a very narrow portion of the frequencies.

What techniques are used by vendors to achieve 2x mode for transmissions?

Of the 52 subchannels, 32 are used for standard transmissions and 20 are used for FEC transmissions.

When transmitting with FHSS, if interference is encountered on a particular frequency then that part of the signal will be retransmitted on the previous frequency of the hopping code.

Describe the FCC restrictions on FHSS.

Although 54 Mbps is the "official" top speed of 802.11a, the IEEE specification also allows for higher speeds. These higher speeds are known as ____________________ mode or 2X mode.

Increasing the speed of the WLAN will cause shorter delays in waiting for reflections.

When using the Shared Wireless Access Protocol, devices can be as far as 45 meters (150 feet) apart and can send and receive data at rates up to ____ Mbps.

The Physical Layer Convergence Procedure (PLCP) standards for 802.11b are based on ____.

IEEE has divided the ____ layer into two sublayers: Logical Link Control (LLC) and Media Access Control (MAC).

Its a Wireless World

Wireless LAN Devices and Standards

How Wireless Works

IEEE 80211 Media Access Control and Network Layer Standards

Planning and Deploying a Wireless LAN

Conducting a Site Survey

Wireless LAN Security and Vulnerabilities

Implementing Wireless Lan Security

Managing a Wireless LAN

Network Settings and Wireless LAN Troubleshooting

Personal, Metropolitan, and Wide Area Wireless Networks

Filters

Exam 4: IEEE 80211 Physical Layer Standards

In FHSS, the amount of time needed to move from one frequency to another is the ____ time.

The value of layers in the OSI reference model is that it divides networking into a series of tasks, and then illustrates how those tasks relate to each other.

Narrowband transmissions require significant power for the signal to be transmitted because the signal must exceed the ____________________, or the total amount of outside interference, by a substantial margin.

The 802.11g standard outlines two mandatory modes along with one optional mode. Describe each mode.

What is the Open Systems Interconnection (OSI) reference model?

What are the advantages to using DSSS with a chipping code?

What is a disadvantage of narrowband transmissions?

What are disadvantages of the 802.11g standard?

How does OFDM work?

____ signals by nature transmit on only one frequency or a very narrow portion of the frequencies.

What techniques are used by vendors to achieve 2x mode for transmissions?

Of the 52 subchannels, 32 are used for standard transmissions and 20 are used for FEC transmissions.

When transmitting with FHSS, if interference is encountered on a particular frequency then that part of the signal will be retransmitted on the previous frequency of the hopping code.

Describe the FCC restrictions on FHSS.

Although 54 Mbps is the "official" top speed of 802.11a, the IEEE specification also allows for higher speeds. These higher speeds are known as ____________________ mode or 2X mode.

Increasing the speed of the WLAN will cause shorter delays in waiting for reflections.

When using the Shared Wireless Access Protocol, devices can be as far as 45 meters (150 feet) apart and can send and receive data at rates up to ____ Mbps.

The Physical Layer Convergence Procedure (PLCP) standards for 802.11b are based on ____.

IEEE has divided the ____ layer into two sublayers: Logical Link Control (LLC) and Media Access Control (MAC).

Its a Wireless World

Wireless LAN Devices and Standards

How Wireless Works

IEEE 80211 Media Access Control and Network Layer Standards

Planning and Deploying a Wireless LAN

Conducting a Site Survey

Wireless LAN Security and Vulnerabilities

Implementing Wireless Lan Security

Managing a Wireless LAN

Network Settings and Wireless LAN Troubleshooting

Personal, Metropolitan, and Wide Area Wireless Networks

Filters