How does Direct Sequence Spread Spectrum (DSSS) work?
What will be an ideal response?
DSSS first spreads the data across any of up to 14 channels, each 22 MHz in width. The data signal is sequenced over the channels and is amplified to have a high gain to combat interference. For speeds of 5.5 Mbps and above, 802.11b also uses Barker Code and Complementary Code Keying (CCK), which enables DSSS to send more information per transmission.
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How can you determine whether the working directory is the home direc- tory of an NIS user?
What will be an ideal response?
Write a method called power the computes xn where x and n and positive integers. The method has two integer parameters and returns a value of type long.
What will be an ideal response?
In Internet Explorer, which of the following elements displays a tab for up to ten open Web pages?
A) Quick Tabs button B) tab row C) Tab button D) Refresh button
Which of the following would be the best example of a post-test loop?
A. Print a number backward. B. Validate data read from the keyboard. C. Print a calendar. D. Print the sum of the digits in an integer.