TRB - Computer Instructor - Computer Science - Communication and Network Concepts

Buy Computer Instructors Grade I -Tamil Nadu Board Practice test pack

Question - 1

A channel has propagation delay of 10 s. For 320 bits frame, what will be the channel bit rate of stop-and-wait give efficiency of 50% ?

  • A 80 byte/s
  • B 110 byte/s
  • C 16 byte/s
  • D 320 byte/s

Question - 2

A go-back-n ARQ uses a window size of 15. How many bits are needed to define the sequence number?

  • A 4
  • B 5
  • C 15
  • D 16

Question - 3

Segmentation is done in

  • A transport layer
  • B network layer
  • C data link layer
  • D physical layer

Question - 4

Network layer activities are

  • A logical addressing
  • B port addressing
  • C access central
  • D All of these

Question - 5

As the data packet moves from a lower layer to higher layer, the headers

  • A added
  • B removed
  • C re-arranged
  • D modified

Question - 6

Hop-to-hop delivery is related to

  • A data link layer
  • B network layer
  • C transport layer
  • D All of these

Question - 7

Process -to process delivery is related to

  • A data link layer
  • B network layer
  • C transport layer
  • D None of these

Question - 8

Synchronization of bus is done by

  • A data link layer
  • B network layer
  • C transport layer
  • D None of these

Question - 9

Which of the following OSI layer performs error checking of data?

  • A Network
  • B Transport
  • C Data link
  • D Physical

Question - 10

Flow control is the responsibility of

  • A data link layer
  • B transport layer
  • C Both (a) and (b)
  • D application layer
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