COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK TOPOLOGIES AND PROTOCOLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Application Layer (4)
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Data Link Layer (1)
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Transport layer (3)
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Network Layer (2)
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Detailed explanation-1: -The data link layer takes the data bits and “frames, ‘’ and creates packets of the data to guarantee reliable transmission. This layer adds source and destination addresses to the data stream as well as information to detect and control transmission errors. The data link layer has two sublayers.
Detailed explanation-2: -The physical layer is the first and lowest layer of the Open Systems Interconnection (OSI) communications model. The physical layer’s function is to transport data using electrical, mechanical or procedural interfaces. OSI is a reference model used to show how applications communicate over a network.
Detailed explanation-3: -Layer 1 of The OSI Model: Physical Layer defines electrical and physical specifications for devices. The physical layer defines the relationship between a device and a transmission medium, such as a copper or optical cable.
Detailed explanation-4: -The layers are: Layer 1-Physical; Layer 2-Data Link; Layer 3-Network; Layer 4-Transport; Layer 5-Session; Layer 6-Presentation; Layer 7-Application.