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10 Cards in this Set
- Front
- Back
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OSI Model
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Open Systems Interconnection Model is the primary architectural model for networks. It was created in the late 70's by the International Organization for Standardization (ISO). |
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Application Layer
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Provides a user interface. |
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Presentation Layer
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Presents data and handles processing such as encryption. |
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Session Layer
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Keeps different applications' data separate. |
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Transport Layer
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Provides reliable or unreliable delivery and error correction before retransmit. |
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Network Layer
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Provides logical addressing which routers use for path determination. |
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Data Link Layer
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Combines packets into bytes and bytes into frames. Provides access to media using the MAC address. Performs error detection but not correction. |
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Physical Layer
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Moves bits between devices through cables. |
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LAN
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A data network that is restricted to a single geographical location and encompasses small areas such as an office building or school. LAN's purpose is to interconnect workstation computers for sharing of files and resources. |
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WAN
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A network that spans more than one geographic location, often connecting separated LANs. Slower than LANs and more expensive due to adding routers, dedicated leased lines and implementation is more complicated. |
