DCN Quiz-1

ASCII constitutes the first 127 characters in

• Gray code

• Excess-3 code

• Unicode

• Shift code

Capacity of the channel is not divided between signals travelling in the channels in

• All the three modes (SImplex, Half duplex mode and Full duplex mode)

• Simplex and Full duplex mode

• Half duplex and

  Full duplex mode

• Simplex and Half duplex mode

Which of the following statements is/are false?

• Stream of bits from network layer is divided into manageable unit called packets is known as framing

• Upper layers are almost always implemented in software.

• Lower layers are a combination of hardware and software, except for the physical layer

• Transport layer is responsible for the delivery of a message from one process to another.

Protocols are

• logical communication channels used for transferring data

• agreements on how communication components are to communicate

• physical communication channels used for transferring data

• None of the above

The method of communication in which transmission takes place in both directions, but only in one direction at a time is called

• Simplex

• Full duplex

• Half duplex

• Four wire circuit

End to end connectivity is provided from source host to destination host in

• The transport layer

• The network layer

• The session layer

• It is the combined functionality of network and the data link layer

We insert a demultiplexer in the line to make two inputs out of one in

• Multilevel multiplexing

• Pulse stuffing

• Multiple slot multiplexing

• Bit stuffing

The network topology that supports bi-directional links between each possible node is

• Ring

• Star

• Mesh

• Bus

In a broad sense, a railway track is an example of

• Half duplex

• Full duplex

• Simplex

• None of the above

Match the following

1. The network layer          (i) the lowest layer

2. The data link layer                       (ii) performs routing and communication

3. The physical layer                        (iii) error detection and correction in data

4. The presentation layer             (iv) provides the syntax of the data

• 1-(iii), 2-(i), 3-(iv), 4-(ii)

• 1-(ii), 2-(i), 3-(iv), 4-(iii)

• 1-(iv), 2-(i), 3-(ii), 4-(iii)

• 1-(ii), 2-(iii), 3-(i), 4-(iv)