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Summary: Ccna Wireless 200-355 Official Cert Guide | 9780134307183 | David Hucaby
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Read the summary and the most important questions on CCNA Wireless 200-355 Official Cert Guide | 9780134307183 | David Hucaby
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1 Chapter 1. RF Signals and Modulation
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1.1 Understanding RF Power and dB
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(+ /-) 3dB value difference what does it mean?
It means the meassurement value is twice (2x) the reference value -
(+/-) 10 dB value difference what does it mean?
It means the meassurement value is ten (10x) the reference value -
2 Chapter 2. RF Standards
This is a preview. There are 34 more flashcards available for chapter 2
Show more cards here -
Waarom begint de 5Ghz U-NII-1 band op channel 36 en niet op channel 1
De 5Ghz band (beginnend met channel 0 op frequency 5.00) is verdeeld in 5Mhz banden. Aangezien U-NII-1 begint op 5.180, dan is dat 180/5 = channel 36 -
Welke 802.11g geeft meer bandbreedte: ERP of Protected?
De ERP, aangezien bij Protected eerst met DSSS Ready to send (RTS) en Clear to send (CTS) signalering moet worden aangegeven dat er een OFDM bericht volgt. de CTS en RTS zijn overigens op low data rate. -
Hoeveel subchannels zitten er in een 20 Mhz OFDM 802.11a/g kanaal?
48 bruikbare, maar er zitten ook guarding en spacing subchannels -
What are the key components of the second wave of 802.11ac
Max Spatial: 4. Max Channel Aggregation: 160 Mhz. Max modulation: 256-QAM MU-Mimo: Yes. Max dataspeed: 2.6 Gbps -
As a global Wifi Citizien, in which Regulation Domain could you live best?
In the S Domain: The most channels :)
S (S regulatory domain):
●2.412 to 2.472 GHz; 13 channels
●5.180 to 5.320 GHz; 8 channels
●5.500 to 5.700 GHz;, 11 channels
●5.745 to 5.825 GHz; 5 channels -
What are the ISM frequencies?
5.725 t/m 5.825 Ghz U-NII-3
2.400 t/m 2.500 Ghz -
What is the Mhz spacing on the 2.4 band?
5 MHz -
How many subchannels are there in the 2.4 band?
1 t/m 14
2.412 , 2.417 , 2.422 .. 2.472; 2.484
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