CMS专题
单选题Which signal and noise values will result in the best phone communication with an access point?（）A signal strength 46dBm, noise level 95dBmB signal strength 74dBm, noise level 94dBmC signal strength 68dBm, noise level 79dBmD signal strength 50dBm, nois
题目
signal strength 46dBm, noise level 95dBm
signal strength 74dBm, noise level 94dBm
signal strength 68dBm, noise level 79dBm
signal strength 50dBm, noise level 56dBm
相似问题和答案
第1题：
An analog signal's characteristic quantity representing data may 66). at any instant, any value within a continuous(67). For example, an analog signal may follow continuously the values of another physical quantity representing data.A discrete signal is composed of(68)elements in time, each element having one or more characteristic quantities which can represent data. Examples of characteristic quantities are amplitude, waveform,(69), and position in time. A digital signal is a special case of discrete signals, in which data are represented by a(70)number of well-defined discrete values that one of its characteristic quantities may take in time.
A．acquire
B．collect
C．assume
D．fetch
第2题：
Which of these terms refers to call issues that cause variations in timing or time of arrival？（）
- A、queuing
- B、jitter
- C、packet loss
- D、digitized sampling
- E、signal-to-noise ratio ratio
正确答案:B
第3题：
According to Shannon's equation, what is the channel capacity of an analog voice-grade phone line with a bandwidth of 3100 Hz and a signal-to-noise ratio or 30 dB?
A．9.1 Kbps
B．9.3 Kbps
C．30.9 Kbps
D．30.17 Kbps
第4题：
You are the Cisco Network Designer in Cisco.com. Which signal and noise values will result in the best phone communication with an access point?（）
- A、signal strength 5dBm
- B、signal strength 6dBm
- C、noise level 4dBm
- D、noise level 5dBm
正确答案:B,D
第5题：
What does a broad-spectrum interferer lower？（）
- A、SNR
- B、noise floor
- C、level of interference
- D、Received Signal Strength Indicator
正确答案:A
第6题：
A. signal strength 5dBm
B. signal strength 6dBm
C. noise level 4dBm
D. noise level 5dBm
第7题：
This result（）my research, Can you see it?
- A、 proves
- B、 approves
- C、 welcomes
- D、 values
正确答案:A
第8题：
The maximum data rate of any single wireless link can be described by the shannon’s theorem which is related to the（）in hertz，and the（）on the channel
A．signal frequency B．bandwidth C．carrier frequency D．noise frequency A．signal B．caeeier C．noise D．data signal
第9题：
In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）
- A、the signal to noise of the current optical amplifier
- B、the signal to noise of the previous amplifier or source
- C、the signal to noise introduced by the optical multiplexer
- D、the accumulated noise to signal ratio of the optical channel
正确答案:B
第10题：
A user reports that when the phone rings in their house the wireless on their laptops becomes disconnected. Which of the following BEST describes the issue?（）
- A、The cordless phones are plugged into same outlet as the router
- B、The cordless phones are 5.8Ghz which interferes with wireless
- C、The cordless phones are 2.4Ghz which interferes with wireless
- D、The cordless phones are plugged into the RJ-11 jack
正确答案:C