You are evaluating a connection that states the data rate is 150 Mbps. What is the expected throughput of this connection?

Question

Options

• ALess than 150 Mbps because of 802.11 overhead and contention
• B54 Mbps because that is the actual maximum throughput of an 802.11 connection
• CMore than 150 Mbps because of compression
• D150 Mbps because the data rate is equal to the throughput

• A
  91% (48)
• B
  6% (3)
• C
  2% (1)
• D
  2% (1)

Explanation

The data rate of a signal is the speed that the data bits in individual 802.11 data frames are sent, but it does not account for the actual amount of data that can be transmitted over time. The throughput of a connection is the flow of information over time, which is affected by various factors such as data encoding, modulation, encryption, airtime utilization, noise levels, interference, etc. Therefore, the throughput is always lower than the data rate. According to one of the web search results1, the actual throughput is normally 60-70 percent of the supported data rates. So, for a connection with a data rate of 150 Mbps, the expected throughput would be around 90-105 Mbps.

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