Computer Networks Questions & Answers – Datagram Networks MCQ أسئله شبكات بالأجابات الجزء الثالث و الستون

 Computer Networks Questions & Answers – Datagram Networks

1. Datagram switching is done at which layer of OSI model?
a) Network layer
b) Physical layer
c) Application layer
d) Transport layer

Answer: a
Explanation: Datagram switching is normally done at network layer.

2. Packets in datagram switching are referred to as
a) Switches
b) Segments
c) Datagrams
d) Data-packets

Answer: c
Explanation: As the name suggests, in datagram switching packets are called as datagrams.

3. Datagram networks mainly refers to
a) Connection oriented networks
b) Connection less networks
c) Telephone networks
d) Internetwork

Answer: b
Explanation: The switch does not keep the information about the connection state, hence it is connection less.

4. Datagrams are routed to their destinations with the help of
a) Switch table
b) Segments table
c) Datagram table
d) Routing table

Answer: c
Explanation: Routing table is used to route the packets to their destinations.

5. The main contents of the routing table in datagram networks are
a) Source and Destination address
b) Destination address and Output port
c) Source address and Output port
d) Input port and Output port

Answer: b
Explanation: Routing table contains destination address and output port to route the packets to their destinations.

6. Which of the following remains same in the header of the packet in a datagram network during the entire journey of the packet?
a) Destination address
b) Source address
c) Checksum
d) Padding

Answer: a
Explanation: Destination address remains same in the header during the entire journey of the packet.

7. Which of the following is true with respect to the delay in datagram networks?
a) Delay is greater than in a virtual circuit network
b) Each packet may experience a wait at a switch
c) Delay is not uniform for the packets of a message
d) All of the mentioned

Answer: d
Explanation: All the options are true with respect to the delay in datagram networks.

8. During datagram switching, the packets are placed in __________ to wait until the given transmission line becomes available.
a) Stack
b) Queue
c) Hash
d) Routing table

Answer: b
Explanation: Packets are stored in queue during delay and are served as first in first out.

9. The probability of the error in a transmitted block _________ with the length of the block
a) Remains same
b) Decreases
c) Increases
d) None of the mentioned

Answer: c
Explanation: Probability of the error in a transmitted block increases with the length of the block.

10. Which of the following is true with respect to the datagram networks?
a) Number of flows of packets are not limited
b) Packets may not be in order at the destination
c) Path is not reserved
d) All of the mentioned

Answer: d
Explanation: All are the facts with respect to the datagram networks.

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