Network+ Guide to Networks (MindTap Course List)
7th Edition
ISBN: 9781305090941
Author: Jill West, Tamara Dean, Jean Andrews
Publisher: Course Technology
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Expert Solution & Answer
Chapter 6, Problem 1RQ
Program Description Answer
The lowest layer that includes both wired and wireless transmissions on same protocols in an OSI model is layer 3.
Hence, the correct answer is option “B”.
Expert Solution & Answer
Explanation of Solution
Layer 3:
- In OSI model, network layer is also termed as Layer 3.
- Network layer is used to deliver the messages from source to vital destination.
- Network layer protocols transfers the message from source to destination.
- It delivers the message from end-to-end.
- It provides a universal addressing scheme for all nodes in the network and every node should use the same addressing scheme.
- It provides a guarantee in the delivery of message in a point-to-point connection with the help of data link layer.
Explanation for incorrect options:
Layer 4:
- In OSI model, transport layer is also termed as Layer 4.
- The purpose of transport layer in OSI model 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, the option “A” is wrong.
Layer 2:
- In OSI model, data link layer is also termed as Layer 2.
- It makes the transmission of data reliable 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 send the acknowledgement to the source.
Hence, the option “C” is wrong.
Layer 1:
- In OSI model, physical layer is also termed as Layer 1.
- Physical layer is used for structuring the undefined data or information over the medium.
- It defines about the interfaces related to the physical medium.
Hence, the option “D” is wrong.
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Students have asked these similar questions
1. Show that S₁ = S2 if and only if S₁ U S2 = S₁n S2.
2. Show that if S1 and S2 are finite sets with |S₁ = n and |S₂| = m, then
S₁ U S2 ≤n+m.
3. If language L is regular and is given by L ={awa : w = {a, b} *}
Then show that L² is regular.
Problem 3: Consider the two-link planar elbow manipulator shown below with link information: a₁ = 3,
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(b) Find the values of joint variables 01, 02 if the robotic manipulator is commanded to reach the desired
location of Pº = [4.5, 3,0]. Notice there are possibly two sets of solutions.
(c) Also sketch the two poses of the robot for the computed joint variables.
Page 5 of 7
Problem 5: The following shows the schematic of a SCARA robot and its DH parameters. Complete the
following questions based on this information.
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3
Chapter 6 Solutions
Network+ Guide to Networks (MindTap Course List)
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