Basic CS-Networks [TCS Placement]: Sample Questions 101 - 103 of 133

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Question 101

Networks
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Describe in Detail

Essay▾

What is semantic gap?

Explanation

  • “Semantic gap” is difference between high-level programming sets, and the computing instructions in machine language.
  • This calls for ways of mediating between high-level language and basic machine language.
  • Another way to look at it is as the gap between what applications expects and what the underlying technology can provide.
Given the Image is Define the Semantic Gap

Question 102

Networks
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Describe in Detail

Essay▾

What is Brouter?

Explanation

  • Hybrid device that combines the features of both bridges and routers.
  • Forwards data between networks (serving as a bridge) , but also sroute data to individual systems within a network (serving as a router) .
  • Bridge connects two separate networks simply forwarding the incoming packets from one network to the next.
  • Router can route packets to specific connected systems.
  • Brouter combines these two functions by routing some incoming data to the correct systems, while forwarding other data to another network.
Given the Image is Define the Brouter

Question 103

Networks
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Describe in Detail

Essay▾

Name the categories of multiplexing

Explanation

There are three basic forms of multiplexing:

  • Frequency Division Multiplexing (FDM) : In Frequency Division Multiplexing (FDM) multiple data signals are combined for simultaneous transmission via a shared communication medium.
  • Time Division Multiplexing (TDM) : In Time division multiplexing (TDM) two or more streaming digital signals are transmitted over a common channel.
    • Synchronous TDM
    • Asynchronous TDM or Statistical TDM
  • Wave Division Multiplexing (WDM) : In wavelength division multiplexing, (WDM) numerous data streams are modulated, i.e.. optical carrier signals of varying wavelengths (colors) of laser light, onto a single optical fiber.
Types of Multiplexing

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