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3 Cards in this Set
- Front
- Back
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OSI?name of each layer? |
Open Systems Interconnection
ApplicationPresentationSessionTransportNetworkData LinkPhysical
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Description of each layer?(4.7) |
1. Physical – defines how to move bits from one device to another. It deals with the physical characteristics of the transmission medium, describing connectors, pins, cables, connectors, and network interface cards.
2. Data Link – combines packets into bytes and bytes into frames. Each frame has a header and a trailer. A header contains the source and destination MAC address. A trailer contains the Frame Check Sequence field, used for errors detection. The Data Link layer is divided into two sublayers: Logical Link Control – used for flow control and error detection and Media Access Control – used for hardware addressing and controlling the access method.
3. Network – provides logical addressing used by routers for path determination. Logical addressing is used to identify a host on a network (for example, by its IP address).
4. Transport – provides reliable or unreliable delivery and error recovery and flow control.
5. Session – determines how to establish, control and terminate a session between the two systems.
6. Presentation – defines data formats. Processes such as compression and encryption are handled at this layer
7. Application – provides a user interface and enables network applications to communicate with other network applications. |
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Protocol of each layer |
Application – HTTP, Telnet, FTPPresentation – MIMESession – SSL, NetBIOSTransport – TCP, UDPNetwork – IP, ICMPData Link – PPP, HDLC, EthernetPhysical – Ethernet |
