253863
Descrição
Mapa Mental por jce299792458, atualizado more than 1 year ago
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Criado por jce299792458
aproximadamente 11 anos atrás
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OSI Layers and Their Functions
- Application layer
- interface between the communications software and any
applications
- It also defines processes for user authentication.
- It also defines processes for user authentication.
- interface between the communications software and any
applications
- Presentation layer
- define and negotiate data formats
- Encryption is also defined.
- Encryption is also defined.
- define and negotiate data formats
- Session layer
- how to start, control, and end conversations (called sessions).
- includes the control and management of multiple bidirectional
messages
- includes the control and management of multiple bidirectional
messages
- how to start, control, and end conversations (called sessions).
- Transport layer
- focuses on issues related to data delivery to another computer
- for example, error recovery and flow control
- for example, error recovery and flow control
- focuses on issues related to data delivery to another computer
- Network layer
- Logical addressing
- defines how each device can have an address that can be used by
the routing process
- defines how each device can have an address that can be used by
the routing process
- Routing
- defines how devices (typically routers) forward packets to their final
destination
- defines how devices (typically routers) forward packets to their final
destination
- Path determination
- work done by routing protocols to learn all possible routes and choose the
best route
- work done by routing protocols to learn all possible routes and choose the
best route
- Logical addressing
- Data link layer
- defines the rules that determine when a device can send data over a particular medium
- also define the format of a header and
trailer
- also define the format of a header and
trailer
- defines the rules that determine when a device can send data over a particular medium
- Physical layer
- refers to standards from other organizations
- These standards deal with the physical characteristics of the
transmission medium
- These standards deal with the physical characteristics of the
transmission medium
- refers to standards from other organizations
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