The physical layer, in reference to the OSI model, defines a. the virtual circuit interface to packet-switched service b. the interface between the X.25 network and packet mode device c. data link procedures that provide for the exchange of data via frames that can be sent and received d. All of the above

Comptia A+ Core 1 Exam: Guide To Computing Infrastructure (mindtap Course List)
10th Edition
ISBN:9780357108376
Author:Jean Andrews, Joy Dark, Jill West
Publisher:Jean Andrews, Joy Dark, Jill West
Chapter8: Network Infrastructure And Troubleshooting
Section: Chapter Questions
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The physical layer, in reference to the OSI model, defines
a. the virtual circuit interface to packet-switched service
b. the interface between the X.25 network and packet mode device
c. data link procedures that provide for the exchange of data via frames that can be sent and received
d. All of the above
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