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31. It is desired to send a sequence of computer screen images over an optical fiber. The screen is 480 x 640 pixels, each pixel being 24 bits. There are 60 screen images per second. How much bandwidth is needed, and how many microns of wavelenth are needed for this band at 1.30 microns?
1.0 x 105 microns
2 x 105 microns
2.5 x 105 microns
5 x 105 microns
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32. Establishing a virtual connection is virtually equivalent to
connecting as virtual memory
physically connecting a DTE and DCE
placing a telephone call prior to a conversion
placing a modem prior to a conversion
33. How many digits of the network user Address are known as the DNIC (Data Network Identiication Code) ?
First three
First four
First five
First seven
34. How many digits of the DNICC (Data Network Identiication Code) identify the country ?
First six
35. Which of the following digits are known as the area code of the network user address (NUA) ?
5-7
1-4
8-12
13-14
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