CCNA Wireless SuperMemos
Encoding and Modulating
Questions Only
What form of CSMA does 802.11 use?
What does DCF stand for?
Your wireless station heres someone transmit and waits the duration heard plus what value?
What logically seperates WLANs?
Name three requirements to roam between two autonomous APS.
What method causes changes to the characteristics of the RF signal?
What method changes the RF to make 0 and 1s?
What is the strength of a radio signal called?
What is the timing of the signal between peaks called?
How often the signal repeats in a second is called what?
What is the most popular frequency range for WLAN used today?
How many channels are used in the 2.4 GHz range?
How wide is each channel in the 2.4 GHz range?
What is the sending of 11 bits with each data bit?
Complimentary Code Keying is used with what speeds?
How many bits per symbol do you have with Differential Binary Phase Shifting?
How many bits per symbol encoded per symbol with DQPSK?
OFDM is used in which two 802.11 standards?
What is the technology used in 802.11n that uses multiple antenna?
As a client moves away from an AP, what happenes to the sending and receiving rate?
Questions and Answers
What form of CSMA does 802.11 use?
Collision Avoidance
What does DCF stand for?
Distributed Coordinated Function
Your wireless station heres someone transmit and waits the duration heard plus what value?
DCF Inter Frame Spacing (DIFS)
What logically seperates WLANs?
Service Set Identifiers (SSIDs)
Name three requirements to roam between two autonomous APS.
Sames SSID; Non-overlapping channels; 15% overlap
What method causes changes to the characteristics of the RF signal?
Modulation
What method changes the RF to make 0 and 1s?
Encoding
What is the strength of a radio signal called?
Amplitude
What is the timing of the signal between peaks called?
Phase
How often the signal repeats in a second is called what?
Frequency
What is the most popular frequency range for WLAN used today?
2.4 GHz
How many channels are used in the 2.4 GHz range?
11
How wide is each channel in the 2.4 GHz range?
22 MHz
What is the sending of 11 bits with each data bit?
Barker Code
Complimentary Code Keying is used with what speeds?
5.5 Mbps and 11 Mbps
How many bits per symbol do you have with Differential Binary Phase Shifting?
1
How many bits per symbol encoded per symbol with DQPSK?
2
OFDM is used in which two 802.11 standards?
802.11a and 802.11g
What is the technology used in 802.11n that uses multiple antenna?
MIMO
As a client moves away from an AP, what happenes to the sending and receiving rate?
Shifts down with Dynamic Rate Shifting
