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10 Question-Answer on line communications 1.        Free space is an example of (a)     Unguided medium (b)    Guided medium (c)     Both (a) and (b) (d)    Neither (a) nor (b) Ans: (a) 2.        Out of guided media, maximum band width is of (a)     Twisted pair (b)    Co-axial cable (c)     Optical fiber (d)    None of the above. Ans: ( c) 3.        Point to point communication requires the use of (a)     A guided medium only (b)    Unguided medium only (c)     Any medium (d)    Neither Ans: (a) 4.        For a twisted pair, upper limit on the frequency is: (a)     10 MHz (b)    1 MHz (c)     10 kHz (d)    10 GHz Ans: ( b) 5...