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Which of following is not used in LANs?
a) modem                                            

b) cable
c) interface card                  

d) none of these


Which of the following represents the fastest data transmission speed?
a) Gbps                                 

b) Kbps
c) Bps                                                    

d) bandwidth


WI-FI uses……………..
a) phase line                                        

b) radio waves
c) optic fiber                                        

d) sound waves