10.12题库中的错误答案

fengqidan

% R& l- S" V1 K5 _. ?看了一下题库，题目22和152的答案貌似有误。
# x* D9 T5 ~+ Y0 i+ J22题，题库给出的答案是BC， 正确应为BE.Which two pieces of information are necessary to compute SNR? (Choose two.)
- m& w5 G0 m' r8 M& E1 u  cA. transmit power
# _- \8 u4 \$ x$ t* [B. noise floor
* m$ g" v% a  W7 J+ Z) O$ Q4 \: B  X' `C. EIRP
% Y1 h3 u# F% ~9 \D. antenna gain
" V* Z+ A/ ?; G& _: }+ YE. RSSI


152题题库给为B，正确应为A
2 f! v; y  y4 E152. What is calculated using the numerical values of the transmitter power level, cable loss, and antenna gain?
/ o2 Y9 [' @. r  T6 @3 H! JA. EIRP
# C- w' h4 S4 ]B. dBi
- d( f8 _$ N6 y/ [8 @, {C. RSSI
; B' B8 Y0 a7 }  |& q0 i' ^" YD. SNR


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如有不同意见，欢迎讨论
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xworkman

感謝分享

xworkman

感謝分享

Gkenny

感謝分享

robblam

152 应该是dBI

robblam

别人说了的，发射功率用什么表示

fengqidan

152题解释
8 g4 X* ^: p0 A& y+ O% [, X
) r2 C8 i5 G1 l: t( x原题翻译为：什么是由发射功率，馈线损耗和天线增益三项的数字值计算得来的
EIRP (Effective Isotropic Radiated Power) is the actual amount of signal leaving the antenna and is a value measured in db and is based on 3 values:
" H: {2 S+ S3 pa) Transmit Power (dBm)
b) Cable Loss (dB)
c) Antenna Gain (dBi)
+ n2 C/ v& C' O# O0 K; y5 O
To determine EIRP follow this equation:
. A4 [* Q; ^' x2 B7 h<Transmit Power> - Cable Loss + Antenna Gain = EIRP
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8 D8 W  j0 z8 F' \: Z$ W" ?参见
https://community.cisco.com/t5/w ... h-loss/ta-p/3128478
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thamky

about2580

路漫漫其修远兮，吾将上下而求索

郭家祥

恭喜

anjoyang

Thanks for sharing

aaa24231016

Thanks for sharing

tonyqin

考完还能分享，楼主不错！

ilforno

考完试能分享经验，好样的。

happy7533967

Congrats! Thanks for sharing