Physical Media - Computer Networks Questions and Answers

1.

Geostationary satellites

   A.) Are placed at a fixed point above the earth
   B.) Rotate the earth about a fixed axis
   C.) Rotate the earth about a varying axis
   D.) All of the mentioned

Answer: Option 'D'

All of the mentioned

2.

Fiber optics possess following properties

   A.) Immune electromagnetic interference
   B.) Very less signal attenuation
   C.) Very hard to tap
   D.) All of the mentioned

Answer: Option 'D'

All of the mentioned

3.

Which of this is not a guided media?

   A.) Fiber optical cable
   B.) Coaxial cable
   C.) Wireless LAN
   D.) Copper wire

Answer: Option 'C'

Wireless LAN

4.

Radio channels are attractive medium because

   A.) Can penetrate walls
   B.) Connectivity can be given to mobile user
   C.) Can carry signals for long distance
   D.) All of the mentioned

Answer: Option 'D'

All of the mentioned

5.

UTP is commonly used in

   A.) DSL
   B.) FTTP
   C.) HTTP
   D.) None of these

Answer: Option 'A'

DSL

6.

Coaxial cable consists of _______ concentric copper conductors.

   A.) 1
   B.) 2
   C.) 3
   D.) 4

Answer: Option 'B'

2

8.

If an Optical Carrier is represented as OC-n, generally the link speed equals(in Mbps),

   A.) n*39.8
   B.) n*51.8
   C.) 2n*51.8
   D.) None of these

Answer: Option 'B'

n*51.8


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