Basic CS [TCS Placement]: Sample Questions 149 - 150 of 196

Get unlimited access to the best preparation resource for competitive exams : get questions, notes, tests, video lectures and more- for all subjects of your exam.

Question 149

Basic CS
Edit

Describe in Detail

Essay▾

What are the responsibilities of Session Layer?

Explanation

The Session layer is network dialog controller- establishes, maintains, and synchronizes interaction between the communicating systems.

  • Dialog control

    Allows two systems to start communication with each other in half-duplex or full duplex.

  • Synchronization
    • Allows a process to add checkpoints considered the synchronization points into stream of data.
    • Example: If a system is sending a file of 800 pages, adding checkpoints after every 50 pages is recommended. This ensures that 50-page unit is successfully received and acknowledged. This is beneficial at the time of crash as if a crash happens at page number 110; there is no need to retransmit pages 1 to100.

Question 150

Basic CS
Edit

Describe in Detail

Essay▾

What is Synchronous TDM?

Explanation

  • In STDM, the multiplexer allocates exactly the same time slot to each device at all times, whether or not a device has anything to transmit.
  • This time slice is allocated even if a device has nothing to transmit and hence is wasteful.
  • Synchronous TDM thus does not maximize line usage and efficiency.
Given the Image is Define the Synchronous Time Division Multiplexing

Developed by: