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16 Cards in this Set
- Front
- Back
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The process of transferring a message between sender and receiver is more easily implemented by breaking it down into simpler components.
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OSI model
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OSI stands for
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Opens Systems Interconnection
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How many layers are in the OSI modal?
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7
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an agreed-upon format for transmitting data between two devices.
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protocol
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What are the layers of the OSI model in order?
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Application
Presentation Session Transport Network Data link Physical |
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Provides a set of interfaces/utilities for user’s applications to access network services
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application
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formats data for presentation to the user,
May provide data formatting, compression, encryption, or translation between different data formats. |
presentation
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responsible for initiating, maintaining and terminating each logical session between sender and receiver.
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session
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deals with end-to-end issues
Flow control segmenting the message for network transport, and maintaining the logical connections between sender and receiver. |
transport
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responsible for
addressing networks (logical addressing), moving data between networks, and making routing decisions. |
network
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deals with
message delineation (forming a frame) physical addressing (NIC address) error control, and network medium access control |
data link
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defines how individual bits are encoded into electronic signals to be transmitted through the network.
Hardware interfacing Cabling standard Signaling rate |
physical
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What are the two names of the communication standards?
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De Jure (official):
De Facto |
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standards that emerge in the marketplace and are widely used, but lack official backing by a standards-making body
Example: EBCDIC (Extended Binary-Coded Decimal Interchange Code ) |
De facto
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a standard developed by an industry or government standards-making body
Example: ASCII, Internet standards |
De Jure
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What are the 3 steps of the standardization processes?
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Specification
Identification of choices Acceptance |
