Term
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Definition
| Determines whether or not a particular node can place data on the network at a given time |
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Term
| Name the Media Access Methods |
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Definition
1-Contention-based/Competitive Media Access
2-Controlled/Deterministic Media Access |
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Term
| Controlled or Deterministic Systems |
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Definition
| Ensures that a single node cannot saturate the network. ALL NODES GET A CHANCE TO SEND DATA |
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Term
| Competitive or Contention Based Media Access |
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Definition
| A media access method in which all nodes compete for the chance to send data across the network. All nodes ARE NOT guaranteed access to the network media |
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Term
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Definition
| A central device combines the signal from multiple nodes and transmits the combined signal across the media, to carry muliple signals the medium or channel is seperated logically into smaller multiple channels |
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Term
| Time-division Multiplexing(TDM) |
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Definition
| a communication channel is divided into discrete TIME SLOTS. Each node is assigned a time slot and each sender is given a specific period of time. Uses a mux |
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Term
| Frequency-Division Mulitplexing(FDM) |
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Definition
| Data from multiple nodes are sent over multiple frequencies or channels over the network medium. The mux puts each nodes signal into its own channel |
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Term
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Definition
| A central device that combines the data from each node on the network to be sent over the primary network medium. BOTH FDM and TDM use a mux |
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Term
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Definition
| Seperates data sent from a mux into its original form |
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Term
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Definition
| Is a controlled access method in which a central device contacts each node in turn to see whether it has data to transmit. Each node is guaranteed access to the media but network time can be wasted polling nodes that have no data to transmit |
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Term
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Definition
| Is when a node can signal their state to a central device(ready to tranmit and define the transmission as high priority) |
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Term
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Definition
| Carrier Sense Multiple Access/Collision Detection: All nodes have access to the media but must detect and manage data collisions by receiving fragmented packets return to the sender after a collision |
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Term
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Definition
| Carrier Sense Multiple Access/Collision Avoidance:All nodes have access to the media but use a jam signal to let other nodes that there is an intent to send data, and gives all other nodes time to receive the jam signal, then transmits data |
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Term
| Contention or Collision Domains |
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Definition
| A group of nodes on a contention-based network that compete with each other for access to the media |
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