Chapter_2 - Todd Lammles CompTIA Network Chapter 2 OSI...

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Click to edit Master subtitle style Todd Lammle’s CompTIA Network+ Chapter 2: OSI Specifications Instructor:
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Chapter 2 Objectives The Following CompTIA Network+ Exam Objectives Are Covered in This Chapter: 4.1 Explain the function of each layer of the OSI model Layer 1 – physical Layer 2 – data link Layer 3 – network Layer 4 – transport Layer 5 – session Layer 6 – presentation Layer 7 – application 2
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Internetworking Models 3 In the late 1970s, the Open Systems Interconnection (OSI) reference model was created by the International Organization for Standardization (ISO) to break through this barrier. The OSI model was meant to help vendors create interoperable network devices and software in the form of protocols so that different vendor networks could work with each other. The OSI model is the primary architectural model for networks. It describes how data and network information are communicated from an application on one computer through the network media to an application on another computer. The OSI reference model breaks this approach into layers.
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