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Netzwerktechnik 2 (Subject) / Chapter 2 (Lesson)
- Name and explain some transmission impairments! Attenuation - decrease signal strengthNoise - Unwanted signals that cause distortion (Verzerrung)Latency - delay to get from source to destination
- What is an analog signal? What is a digital signal? Analog signal: signal intensity varies in a smooth fashion over time, no breaks Digital signal: signal intensity maintains constantly
- Name some advantages and disadvantages of digital signaling. (+)cheaperweniger anfällig zu NOISE (-)anfälliger zu ATTENTUATION
- Why is some form of synchronization needed in data transmission? Because if the clocks are not synchronized then the signal will be misread
- What is half-duplex and full-duplex? half-duplex:sends data only to one direction at a time full-duplex:sends data to both directions simultaneously
- What is the difference between bandwidth and throughput? bandwidth: amount of data that can be transmittedthroughput:amount of data that is transmitted
- What is latency? What causes latency jitter? Latency means delay.How long it takes data to get from source to destination.Latency variation procudes a form of jitter.
- Name some important L2 tasks! Framing -> Where a frame starts and endsError control -> Does the bit stream have errorsFlow control -> how data flow should be regulatedMedia access control -> who can use the mediumPhysical addressing -> what are src and dest?
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