CCNA Wireless Implementing Cisco Wireless Network Fundamentals v1.0 (200-355)

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Total 609 questions

What is the minimum RSSI required for voice on cell boundary?

  • A. 25
  • B. -67
  • C. -40
  • D. -75


Answer : B

Explanation:

Transmitter 20DB - 2db cable loss + 4 antenna gain (69db free space path loss) +4 antenna gain = 2db =?

  • A. -45
  • B. -46


Answer : A

What is derived from measuring the RF duty cycle?

  • A. dynamic channel selection
  • B. LWAPP header length
  • C. RF utilization
  • D. transmit power control


Answer : C

Explanation:

When planning for VoWLAN applications, what must the overlap be between the cells?

  • A. no overlap
  • B. 15 to 20 percent
  • C. 30 to 40 percent
  • D. 25 to 30 percent


Answer : B

Explanation:
The optimal VoWLAN network requires overlaps of 20 percent (2.4 GHz), and approximately 15 to 20 percent (5 GHz), where a WLAN Data design may use an
AP cell overlap of 5 to 10 percent.
Reference:
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/vowlan/41dg/vowlan41dg-book/vowlan_ch3.html

A customer is trying to avoid utilizing DFS frequencies in the 5-GHz spectrum, because he is concerned about interference with radar signals. Which channel should be avoided?

  • A. 36
  • B. 161
  • C. 52
  • D. 149


Answer : C

Which option is defined as RF energy that reduced the SNR on an 802.11 environment?

  • A. interference
  • B. spectrum analyzer
  • C. CCA
  • D. noise


Answer : D

Which technique divides a 20-MHz channel into 52 subchannels to transmit wireless data?

  • A. OFDM
  • B. DSSS
  • C. CCK
  • D. FHSS


Answer : A

Reference:
https://books.google.com/books?id=YUyswy1Q19kC&pg=PA520&lpg=PA520&dq=technique+divides+a+20-MHz+channel+into+52+subchannels+to
+transmit+wireless
+data&source=bl&ots=KPOJ8iJ_Nj&sig=YBoHz6qyaghFqp0nEMngPEREHYE&hl=en&sa=X&ved=0ahUKEwiShOztuYXcAhUl9YMKHVcyA98Q6AEIVjAJ#v=onep age&q=technique%20divides%20a%2020-MHz%20channel%20into%2052%20subchannels%20to%20transmit%20wireless%20data&f=false

What is the numerical value in dBm that corresponds to a power level of 50 mW?

  • A. 16
  • B. 17
  • C. 18
  • D. 20


Answer : B

Which two statements are characteristics of RF mathematics? (Choose two.)

  • A. For every gain of 3 dB, multiply the transmit power mW by 2
  • B. For every gain of 10 dB, multiply the transmit power mW by 100
  • C. For every loss of 30 dB, multiply the transmit power mW by 1000
  • D. For every loss of 30 dB, decrease the transmit power mW by 1000
  • E. For every gain of 3 dB, divide the transmit power mW by 2


Answer : AE

Reference:
https://www.tanaza.com/blog/understand-the-power-gain-with-the-rule-of-10s-and-3s/

Which number is the expected RSSI value for a client card with a 3 dBi antenna and a received signal value of -9 dB?

  • A. -12 dB
  • B. -6 dB
  • C. 6 dB
  • D. 12 dB


Answer : B

What are the minimum requirements to operate cisco 7925 wireless phone? (Choose three)

  • A. RSSI -67
  • B. SNR 25
  • C. 20% cell overlapping
  • D. xxx


Answer : ABC

Explanation -

How much SNR needed to reach 54Mbps in 802.11g network?

  • A. 25
  • B. 10
  • C. 5
  • D. 1


Answer : A

Explanation:

Which three criteria are used when choosing the type of external antenna to connect to an indoor AP? (Choose three.)

  • A. potential interferers
  • B. AP radio frequency
  • C. PoE draw
  • D. signal coverage area
  • E. antenna manufacturer
  • F. number of SSIDs


Answer : ABD

In the 802.11-2007 standard, which metric for 802.11 radios does the RSSI measure?

  • A. amplitude
  • B. wavelength
  • C. frequency
  • D. speed


Answer : A

Which element can be the effect on a signal traversing a dusty environment?

  • A. fading
  • B. scattering
  • C. multipath
  • D. absorption


Answer : C

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Total 609 questions