ddsf:public:guidebook:06_append:glossary:t:transportlayer
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ddsf:public:guidebook:06_append:glossary:t:transportlayer [2020/06/16 18:20] nick created |
ddsf:public:guidebook:06_append:glossary:t:transportlayer [2021/07/14 16:45] (current) murphy ↷ Links adapted because of a move operation |
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| ===== Transport Layer ===== | ===== Transport Layer ===== | ||
| - | [[ddsf:private:cookbook:06_append:glossary| Return to Glossary ]] | + | [[ddsf:public:guidebook:06_append:glossary:start| Return to Glossary ]] |
| - | The **Transport Layer** is the fourth layer in the open system interconnection (OSI) model, and is responsible for end-to-end communication over a network. | + | The **Transport Layer** is seven-layer [[ddsf:public:guidebook:06_append:glossary:o:osi]] of computer networking, the [[ddsf:public:guidebook:06_append:glossary:p:physicallayer|physical layer]] or layer 1 is the first and lowest layer. The implementation of this layer is often termed PHY. |
| - | It provides logical communication between application processes running on different hosts within a layered architecture of protocols and other network components. | + | The physical layer consists of the basic networking hardware transmission technologies of a network. It is a fundamental layer underlying the logical [[ddsf:public:guidebook:06_append:glossary:d:datastructure|data structures]] of the higher level functions in a network. Due to the plethora of available hardware technologies with widely varying characteristics, this is perhaps the most complex layer in the OSI architecture. |
| - | In a nutshell, the Transport Layer collects message segments from applications, and transmits them into the network (Layer 3). Here the segments are reassembled into fully-fledged messages, and passed on to Layer 7. | + | The physical layer defines the means of transmitting raw bits rather than logical data packets over a physical link connecting network nodes. The bit stream may be grouped into code words or symbols and converted to a physical signal that is transmitted over a hardware transmission medium. The physical layer provides an electrical, mechanical, and procedural interface to the transmission medium. The shapes and properties of the electrical connectors, the frequencies to broadcast on, the modulation scheme to use and similar low-level parameters, are specified here. |
| - | The Transport Layer is also responsible for the management of error correction, providing quality and reliability to the end user. | + | Within the [[ddsf:public:guidebook:06_append:glossary:s:semantics|semantics]] of the OSI network architecture, the physical layer translates logical communications requests from the [[ddsf:public:guidebook:06_append:glossary:d:datalinklayer]] into hardware-specific operations to affect transmission or reception of electronic signals. |
| - | This layer enables the host to send and receive error corrected data, packets or messages over a network and is the network component that allows multiplexing. | ||
| - | + | Source: [[https://osi-model.com/physical-layer/ | Transport Layer ]] | |
| - | Source: [[https://www.techopedia.com/definition/9760/transport-layer | Transport Layer ]] | + | |
ddsf/public/guidebook/06_append/glossary/t/transportlayer.1592346002.txt.gz · Last modified: 2020/06/16 18:20 by nick
