Lesson 4 Troubleshooting Ethernet Networks Flashcards
Topic 4B Troubleshoot Common Cable Connectivity Issues
What does the term “nominal bit rate” refer to in networking?
a) The average speed of data transmission
b) The maximum speed of data transmission
c) The minimum speed of data transmission
b. The maximum spee or amount of information that cam be transmitted.
the nominal bit rate—or bandwidth—of the link is the** amount of information that can be transmitted**
How is the nominal bit rate typically measured?
a) In hertz (Hz)
b) In bits per second (bps)
b) In bits per second (bps)
At the data link layer, the nominal bit rate—or bandwidth—of the link is the amount of information that can be transmitted, measured in bits per second (bps)
Which layer of the OSI model is responsible for managing the nominal bit rate?
a) Physical layer
b) Data link layer
c) Network layer
d) Transport layer
b) Data link layer
How is the baud rate defined?
a) The speed of data transmission
b) The number of bits transmitted per second
c) The number of symbols transmitted per second
d) The frequency of the carrier signal
c) The number of symbols transmitted per second
In what unit is the baud rate typically measured?
The number of symbols that can be transmitted per
second is called the baud rate. The baud rate is measured in hertz (or MHz or GHz)
The number of symbols that can be transmitted per second is called:
the baud rate. The baud rate is measured in hertz (or MHz or GHz)
Which layer of the OSI model is responsible for managing the baud rate?
a) Physical layer
b) Data link layer
c) Network layer
d) Transport layer
a) Physical layer
What does the baud rate measure in networking?
a) The speed of data transmission
b) The number of bits transmitted per second
c) The frequency of the carrier signal
d) The number of symbols transmitted per second
d) The number of symbols transmitted per second
In what unit is the baud rate typically measured?
a) Bits per second (bps)
b) Hertz (Hz)
c) Megabits per second (Mbps)
d) Kilobytes per second (KBps)
b) Hertz (Hz)
What purpose does representing more than one bit per symbol serve in data transmission?
a) It reduces the number of symbols transmitted per second
b) It increases the efficiency of data transmission
c) It decreases the bit rate
d) It simplifies the decoding process
b) It increases the efficiency of data transmission
In order to transmit information more efficiently, a signaling method might be capable of representing more than one bit per symbol.
This also helps to overcome noise and detect errors.
What advantage does representing more than one bit per symbol offer in terms of error detection and correction?
a) It increases the probability of detecting errors
b) It decreases the probability of errors occurring
c) It allows for more efficient error correction algorithms
d) It reduces the need for error detection
a) It increases the probability of detecting errors
What is the primary goal of representing more than one bit per symbol in data transmission?
a) To decrease the cost of transmission hardware
b) To reduce the amount of data transmitted
c) To improve the speed and efficiency of data transmission
d) To simplify the decoding process
c) To improve the speed and efficiency of data transmission
What does the term “speed” refer to in Ethernet terms?
a) The actual data transfer rate achieved on a link
b) The physical length of the Ethernet cable
c) The frequency of the carrier signal
d) The number of devices connected to the Ethernet network
a) The actual data transfer rate achieved on a link
What are the common speed specifications for Ethernet links?
a) 10 Kbps, 100 Kbps, 1 Mbps
b) 10 Mbps, 100 Mbps, 1 Gbps
c) 1 Mbps, 10 Mbps, 100 Mbps
d) 100 Mbps, 1 Gbps, 10 Gbps
b) 10 Mbps, 100 Mbps, 1 Gbps
In Ethernet terms, the** speed is the expected performance of a link** that has been properly installed to operate at 10 Mbps, 100 Mbps, 1 Gbps, or better.
What does “throughput” refer to in networking?
a) The maximum data transfer rate achievable on a link
b) The average data transfer rate achieved over a period of time
c) The signal strength of the carrier wave
d) The number of devices connected to a network
b) The average data transfer rate achieved over a period of time
The nominal bit rate will not often be achieved in practice. Throughput is an average data transfer rate achieved over a period of time excluding encoding
schemes, errors, and other losses incurred at the physical and data link layers. Throughput can be adversely affected by link distance and by interference (noise).
How does speed differ from throughput?
a) Speed is the maximum achievable rate, while throughput is the average achieved rate
b) Speed includes encoding schemes and errors, while throughput excludes them
c) Speed is measured in bits per second, while throughput is measured in hertz
d) Speed is affected by link distance and interference, while throughput is not
a) Speed is the maximum achievable rate, while throughput is the average achieved rate
What factors enforce distance limitations on different communication media types?
a) Latency and bandwidth
b) Attenuation and noise
c) Protocol compatibility
d) Signal strength
b) Attenuation and noise
Attenuation is the loss of signal strength, expressed in decibels (dB). dB expresses the ratio between two measurements; in this case, signal strength at origin and signal strength at destination.
Noise is anything that gets transmitted within or close to the channel that isn’t the intended signal. This serves to make the signal itself difficult to distinguish,
causing errors in data and forcing retransmissions. This is expressed as the ignal to noise ratio (SNR).
What is attenuation in the context of communication media?
a) The increase in signal strength over distance
b) The decrease in signal strength over distance
c) The interference caused by nearby electronic devices
d) The maximum supported data rate
b) The decrease in signal strength over distance
Attenuation is the loss of signal strength, expressed in decibels (dB). dB expresses the ratio between two measurements; in this case, signal strength at origin and signal strength at destination.
How does noise affect the transmission of data over communication media?
a) It increases signal strength
b) It reduces signal clarity and reliability
c) It improves data transmission rates
d) It extends the distance limitations
b) It reduces signal clarity and reliability
Noise is anything that gets transmitted within or close to the channel that isn’t the intended signal. This serves to make the signal itself difficult to distinguish,
causing errors in data and forcing retransmissions. This is expressed as the ignal to noise ratio (SNR).
