Network Layer : The operation of the subnet

The section contains multiple choice questions and answers on network layer, the part of the Internet communications process where these connections occur, by sending packets of data back and forth between different networks. In the 7-layer OSI model, the network layer is layer 3. The IP is one of the main protocols used at this layer, along with several other protocols for routing, testing, and encryption.

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Datagram switching is done at which layer of OSI model?

Network layer Physical layer Application layer Transport layer

Which of the following remains same in the header of the packet in a datagram network during the entire journey of the packet?

Destination address Source address Checksum Padding

During datagram switching, the packets are placed in __________ to wait until the given transmission line becomes available.

Stack Queue Hash Routing table

Which of the following is false with respect to the datagram networks?

Number of flows of packets are not limited Packets may not be in order at the destination Path is not reserved Delay is the same for all packets in a flow

Which is also known as a connectionless protocol for a packet-switching network that uses the Datagram approach?

IPV5 IPV4 IPV6 None of these

Which switch is a multistage switch with micro switches at each stage that route the packets based on the output port represented as a binary string?

Banyan switch Crossbar switch Multistage crossbar Packet switch

Packets in datagram switching are referred to as ________.

Switches

Segments

Datagrams

Data-packets

Datagram networks mainly refers to _________.

Connection oriented networks

Connection less networks

Telephone networks

Internetwork

Datagrams are routed to their destinations with the help of ________.

Switch table

Segments table

Datagram table

Routing table

The main contents of the routing table in datagram networks are ___________.

Source and Destination address

Destination address and Output port

Source address and Output port

Input port and Output port

The probability of the error in a transmitted block _________ with the length of the block.

Remains same

Decreases

Increases

Is not proportional

How many digits of the DNIC (Data Network Identification Code) identify the country?

First three

First four

First five

First six

None of the above

A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?

Hot potato routing

Flooding

Static routing

Delta routing

None of the above

The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately equal to,

0.003

0.009

0.991

0.999

None of the above

Quiz/Test Summary

Title: Network Layer : The operation of the subnet

Questions: 14

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