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unit 5 - Coggle Diagram
unit 5
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5.3 The types and applications of protocols used to
create networks and networking referencing models
Transport Layer
The transport layer's tasks include error correction and segmenting data before and after it's transported across the network. This layer is also responsible for flow control and making sure that segmented data is delivered over the network in the correct sequence.
Network Layer
This is the layer that provides data routing paths for network communication. Data is transferred to the receiving device in the form of packets via logical network paths in an ordered format controlled by the network layer. Layer 3 can be either able to support connection-oriented or connectionless networks (but not both of them at the same time).
Session Layer
In the seven-layer OSI model of computer networking, the session layer is layer 5. The session layer provides the mechanism for opening, closing and managing a session between end-user application processes, like a semi-permanent dialogue.
Data Link Layer
The data link layer is used for the encoding, decoding and logical organization of data bits. Data packets are framed and addressed by this layer.
The data link layer's first sublayer is the media access control (MAC) layer. It is used for source and destination addresses. The MAC layer allows the data link layer to provide the best data transmission vehicle and manage data flow control. The data link layer's second sublayer is the logical link control. It manages error checking and data flow over a network.
Presentation Layer
The presentation layer mainly translates data between the application layer and the network format. Data can be communicated in different formats via different sources. The presentation layer is responsible for integrating all formats into a standard format.
Physical Layer
The physical layer deals with bit-level transmission between different devices and supports electrical or mechanical interfaces connecting to the physical medium for synchronized communication. This layer plays with most of the network’s physical connections—wireless transmission, cabling, cabling standards and types, connectors and types, network interface cards, and more.
The physical layer does not deal with the actual physical medium.
Application Layer
An application layer is a layer that specifies the shared communications protocols and interface methods used by hosts in a communications network. An application layer abstraction is specified in the Internet Protocol Suite and the OSI model.
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5.2 Types and applications of networks, hardware
and software, and the functions of Internet of Things
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Kernel
Computer program that is the core of the OS. It controls all aspects of a system and the
next software to be loaded after the bootloader. It remains in memory until the OS is shut down.
Middleware
Sits between the OS and the active applications providing communication and data
management for distributed applications (run on more than one PC)
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5.5 The types, services and benefits of cloud
computing
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