Basic CS-Networks [TCS Placement]: Sample Questions 85 - 86 of 133

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Question 85

Networks
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Describe in Detail

Essay▾

Define Decoder?

Explanation

  • Decoder translates encoded data into its original format (e. g. it decodes the data) .
  • For example, previously the term was used for MPEG-2 video and sound data, which must be decoded before it is output.
  • As another example, decoding is the conversion of an n-bit input code to an m-bit output code with , such that each valid code work produces a unique output code.
  • In cryptography, decoding is the process of converting encrypted code into plain text or any format that is useful for subsequent processes.
  • Hardware decoder is a multiple-input, multiple-output logic circuit which converts coded inputs into coded outputs, where the input and output codes are different.
Given the Image is Define the Decoders

Question 86

Networks
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Write in Short

Short Answer▾

What is Bit stuffing?

Explanation

Bit stuffing adds one extra 0 whenever five consecutive 1՚s follow a 0 in the data, so that the receiver does not mistake the pattern 0111110 for a flag- each frame begins and ends with a special bit pattern called a flag byte [01111110] .

Given the Image is Defining the Bit Stuffing

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