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9 Cards in this Set
- Front
- Back
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Physical Topolgy |
Refers to the physical layout of the wires in a network |
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Logical Topology |
Refers to how data moves through the network Refers to the pattern of data flow in a network |
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Logical vs. Physical Topologies |
Networks can have different physical and logical topologies: Physical layout of wires in network follows one pattern. Data moves through the network in a different pattern. |
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Full Mesh Topology |
All devices are directly connected to ALL other devices This provides full redundancy for the network But increases the cost for the network - most expensive type of topology This is b/c each computer in network is required to have multiple NICs and cables for each node - every computer in the full mesh network. Most likely to be found in WAN environment, seldom used in LAN |
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Partial Mesh Topology |
All devices directly connected to at least two other devices Provides strong redundancy but not full redundancy Not as expensive as full mesh - still expensive configuration Multiple NICs and cables are required for each machine connected into the partial mesh Most likely found in a WAN environment - the internet is a partial mesh |
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Bus Topology |
One of the oldest networking topologies All nodes connect directly to main cable called the bus Simple to put together - disadvantage, only one node can send a signal at a time Contention is used to determine which node sends signal The more nodes active, the more collisions on network After collision, all nodes again contend to send signal Too many collisions can overload and bring down network - referred to as a network storm Recommended for networks with 30 nodes or less Least expensive of the various topologies Single bad node or cable can bring down whole network Not part of current TIA/EIA 568-C standard When using a bus topology need to make sure there is a terminator/terminator resistor on both ends of the main bus cable |
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Ring Topology |
An older network topology Similar to bus - all nodes connected to a backbone cable but cable connected to itself in a ring/circle Packets move in ring pattern around network Each node given opportunity to send a signal - results in no contention between nodes Heavy traffic will not bring down network but can slow it down - if each computer wants to send a signal they will have to wait their turn Single damaged node or cable can bring down network Not part of current TIA/EIA 568-C standard for LAN networks |
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Star Topology |
??? |
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Hybrid Star Topology |
??? |
