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Internetworking&OSI
term | Description/Definition |
---|---|
CSMA/CD | Carrier Sense Multiple Access with Collision Detection... is a Ethernet scheme where each host listens to the wire to see if anyone is talking. Any one device can transmit at any time w/out permission. A collision may occur |
collision domain | section of wire where it is possible for two devices to be sending data at the same time (collisions occur) |
Token ring | scheme where each connected device must wait their turn to send data (when you get the ring you talk). |
simplex mode* | a device using two wires in a cable can only transmit or recieve |
half-duple mode* | when a device using two wires in a cable can transmit and recieve. must take turns |
full-duplex mode* | when a devices can talk and listen at the same time through a four-wire cable, this is collision free. |
UTP | Unsheilded Twisted Pair,,. cable used to connect networking devices using 4 or 8 wires connected to a RJ-45 connector |
connectionless OSI model protocols | protocols that send data over any available path, expect no reply or confirmation of reciept...faster and unreliable |
connection-oriented OSI model protocols | protocols that establish and reserve a specific virtual circuit with a partner before exchanging data. Use flow control, buffeing, and windowing to ensure they were heard.... this is slower but more reliable |
encapsulation | the process of a OSI layer puting header and sometimes trailors on the higher layers PDU |
PDU | protocol data unit... headers, trailors, and data of a certian OSI layer |
tunneling | when one frame type is hidden withing another...used for security reasons |