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7 Cards in this Set
- Front
- Back
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Layer 7
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Application Layer--Where the end-user (computer) begins the communications process. TELNET, FTP, EMAIL reside here. They are not program-applications themselves, but the model interface through which they communicate.
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Layer 6
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Presentation Layer--Encryption and conversion (formating), data compression occur here. JPG, GIF, BMP.
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Layer 5
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Session Layer--Establishes, manages, and terminates user connections. Decisions on whether to use FULL or HALF duplex are made here.
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Layer 4
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Transport Layer--Data transmission completion. It's responsible for flow control and error recovery between to end points in a network connection.
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Layer 3
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Network Layer--Routing and switching takes place. Logical addressing/paths are on this layer. Packet addressing, congestion control, and internetworking happen here. (IP). Routers reside here.
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Layer 2
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DataLink Layer--Broken into 2 sub-sections. LLC (Logical Link Control) controls synchronization and error detection. MAC (Media Access Control) controls packet/information reception, and where CSMA/CD gets authorization to transmit data. Switches reside here.
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Layer 1
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Physical Layer--Hardware and transmission medium reside here. Hubs and repeaters exist here.
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