Briefly describe the 802.11g PHY layer with respect to its multiplexing scheme.
What will be an ideal response?
The PHY layer for 802.11g introduced a transmission technology called orthogonal frequency division multiplexing (OFDM) to the 802.11 standard. Instead of serializing the data and modulating bits onto a single carrier using DSSS or CCK as in 802.11 or 802.11b, respectively, OFDM divides 20 MHz of bandwidth in each of the three usable channels in the ISM band into 52 subcarriers and modulates the bits of data onto 48 of them, then transmits multiple bits and multiple copies of the same data at the same time at a slower data rate than 802.11 or 802.11b.
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According to OSHA standards, your employer must _____.
a. show you how to do each job safely b. tell you where to buy required PPE c. allow you to work independently d. fine employees for safety violations
To make an electric motor move continuously, the magnetic field must rotate.
Answer the following statement true (T) or false (F)
Mice tend to eat certain bulbs, and by planting myrtle in between, the mice may be repelled
Indicate whether the statement is true or false
The subsequent problems deal with the circuit below where all voltage sources are dc and the circuit is assumed to be in steady state. Also, R1 = R2 = R3 = R4 = R.
If I2 = 2 A, the current through R2 is
A. 2 A B. 1 A C. 4 A D. 3/2 A E. 1/2 A