DCCN QUIZ CST

1. Which multiplexing technique used to transmit digital signals?              

• FDM
  
  
  
  

• TDM
  
  

• WDM
  
  

•  FDM & WDM

Physical or logical arrangement of network is __________  

• Topology
  
  

• Routing
  
  

• Networking
  
  

• Control

_______ topology requires a multipoint connection. 

• Star
  
  

• Mesh
  
  

• Ring
  
  

•   Bus

The data link layer takes the packets from _________ and encapsulates them into frames for transmission.    

• network layer
  
  

• physical layer
  
  

• transport layer
  
  

• application layer

Which of the following tasks is not done by data link layer?                   

• framing
  
  

• error control
  
  

• flow control
  
  

• channel coding

The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called        

• piggybacking
  
  

• cyclic redundancy check

• fletcher’s checksum
  
  

•   parity check

Which multiple access technique is used by IEEE 802.11 standard for wireless LAN?                                                                                                                   

• CDMA
  
  

• CSMA/CA
  
  

• ALOHA
  
  

•   CSMA/CD

A wireless network interface controller can work in _______                   

• infrastructure mode

• ad-hoc mode

• both infrastructure mode and ad-hoc mode
  
  

•    WDS mode

Which of the following delay is faced by the packet in travelling from one end system to another?                                                                                     

• Propagation delay

• Queuing delay
  
  

• Transmission delay
  
  

• All of the mentioned

The time required to examine the packet’s header and determine where to direct the packet is part of __________                                                       

• Processing delay
  
  

• Queuing delay
  
  

• Transmission delay
  
  

• Propagation delay