EBK NETWORK+ GUIDE TO NETWORKS
EBK NETWORK+ GUIDE TO NETWORKS
8th Edition
ISBN: 8220106798478
Author: ANDREWS
Publisher: YUZU
Expert Solution & Answer
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Chapter 6, Problem 1RQ

<PROGRAM-DESCRIPTION-ANSWER>

Wired and wireless transmission shares the same protocol in the network layer of OSI model.

Hence, the correct answer is option “B”.

</PROGRAM-DESCRIPTION-ANSWER>

Explanation of Solution

Layer 3: Network layer

  • It is the third level of the Open System Interconnection Model (OSI Model).
  • Network layer performs the routing of packet from source to destination.
  • For routing, it converts the data into packets, and after reaching the destination, it converts back to the data.
  • The primary responsibilities of this layer are to set up a logical connection, data forwarding, routing, and error reporting.

Explanation for incorrect options:

Layer 4: Transport layer

  • Its purpose is to provide the reliable transfer of data between two processes in the computer.
  • This layer ensures the error-free delivery, no loss of data, and duplication.

Hence, option “A” is wrong.

Layer 2: Data link layer

  • It makes the transmission of data reliable, which is provided by the physical layer.
  • For reliable transfer, it divides the data into data frames and transmits through the communication channel.
  • At the destination, it checks for the transmission error and sends the acknowledgement to the source.

Hence, option “C” is wrong.

Layer 1: Physical layer

  • It is concerned with how raw data bits are transmitted from one system to another over a physical communication line.
  • It describes the physical and electrical specifications for device.

Hence, option “D” is wrong.

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