86. Which of the following topologies is not of broadcast type ?

1. 1. Star

   
   
   

   2. Bus

   
   
   

   3. Ring

   
   
   

   4. All of these

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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87. Which of the following refers to a small, single-sitenetwork ?

1. 1. PAN

   
   
   

   2. DSL

   
   
   

   3. RAM

   
   
   

   4. USB

   
   
   

   5. CPU

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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88. A packet filtering firewall operates at which of the following OSI layers ?

1. 1. At the application layer

   
   
   

   2. At the transport layer

   
   
   

   3. At the network layer

   
   
   

   4. At the gateway layer

   
   
   

   5. Both '2' and '3'

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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89. In simplex channel, flow of data is

1. 1. always in one direction

   
   
   

   2. always in both direction

   
   
   

   3. in both direction, but one at a time

   
   
   

   4. All of the above

   
   
   

   5. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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90. Communication channel having ...... types.

1. 1. 1

   
   
   

   2. 2

   
   
   

   3. 3

   
   
   

   4. 4

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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