Chapter 9 New

Chapter 9 New - CSC 311 CHAPTER NINE LOCAL AREA NETWORKS...

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CSC 311 CHAPTER NINE LOCAL AREA NETWORKS
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CSC 311 Local Area Network Topologies bus (common bus) ring (token ring) star fully connected
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CSC 311
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CSC 311 A common bus may be used to connect multiple locations. In each location, you may have a hub or switch.
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CSC 311 Common bus network multiple devices connected only one can send at a time there are variations that allow more than one device to send. requires contention control works well as long as number of connected devices is not large.
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CSC 311 Ring Topology Most such implementations use a “token” to control access Usually just a single token, but some protocols allow more. You can actually use token on a common bus to make it appear, logically, as a ring. Rarely done now.
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CSC 311 DATA LINK CONTROL All of the previously mentioned topologies are defined under various standards. To understand how LAN standards work, it is important to understand where they fit into a layered design (TCP/IP, for example, or OSI) and how they relate to other topics discussed thus far. In the OSI model, the lowest three layers typically define network operations: physical, data link, and network layers.
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CSC 311 Data Link Layer Performs services for the network layer Assumes the existence of the physical layer
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Chapter 9 New - CSC 311 CHAPTER NINE LOCAL AREA NETWORKS...

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