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 Subject: Networking Category: Computers > Hardware Asked by: kpss-ga List Price: \$3.00 Posted: 19 Apr 2003 03:55 PDT Expires: 19 May 2003 03:55 PDT Question ID: 192627
 `How Broadcast And Collision Domains Are Affected By Each Topology` Request for Question Clarification by dogbite-ga on 19 Apr 2003 08:22 PDT ```Hello kpss-ga, What topologies are you speaking of? Thank you, dogbite-ga``` Clarification of Question by kpss-ga on 19 Apr 2003 12:11 PDT `topologies are star, ring, bus, mesh and fully connected` Clarification of Question by kpss-ga on 19 Apr 2003 12:12 PDT `topologies are star, ring, bus, and mesh`
 ```Hello kpss-ga, I'm assuming that your question is equivalent to "What are the characteristics of the star, ring, bus, and mesh network topologies for broadcast transmissions and communication collisions." We define the topologies as: - star: one node, in the center, is connected to every other node. the non-center nodes are only connected to the center node. - ring: each node is connected to exactly two nodes. - bus: all nodes share one communication medium. - mesh: a network topology in which there are at least two nodes with two or more paths between them. These definitions agree with the ones written here: http://www.its.bldrdoc.gov/fs-1037/dir-024/_3535.htm Each topology has the following characteristics for broadcast transmissions: - star: excellent for broadcast. a message from a center node reaches all other nodes in one hop, and a non-center node reaches all other non-center nodes in two hops. - ring: for a ring with 'n' nodes, it takes O(n) hops for a broadcast message to reach all nodes. Also, the broadcast message does not reach every node at the same time. - bus: is broadcast by definition. - mesh: improves, as with the root (square-root, cube-root, etc), as the number of paths between nodes increases. a ring is an instance of mesh. a fully connected graph is also a mesh where broadcast is trivial. For collisions, the characteristics are: - star: the center node is a bottle-neck. any non-center node must secure time with the center node before sending a message. - ring: to avoid collisions, two nodes must secure transmission time with every node along the path between them. without this, collisions could be quite high. - bus: each node has to secure the single transmission medium. the risk for collisions is the highest. - mesh: the probability of collisions decreases as the number of paths between nodes increases. again, ring is one extreme and a fully connected network is the other. a fully connected network has no collisions. I hope that answers your question. dogbite-ga``` Clarification of Answer by dogbite-ga on 20 Apr 2003 15:56 PDT ```Hello kpss-ga, I'm very sorry that I answered so unsatisfactorily. I want to get this right. I interpreted "domain" as "a field" of problems. Can you please elaborate on your question? What do you mean by a "collision domain?" To me, domain is used in the networking sense is "all resources under the control of a single computer system." dogbite-ga``` Request for Answer Clarification by kpss-ga on 21 Apr 2003 03:57 PDT ```how this three models will be Affected By Each Topology Single Domain Model Single Master Domain Model Multiple Master Domain Model``` Clarification of Answer by dogbite-ga on 21 Apr 2003 08:13 PDT ```Hello kpss-ga, The three models are: - Single Domain Model -- userids, etc all exist under one domain. that means they are all managed by one master server on the network. - Single Master Domain Model -- a single machine manages the trusted information, and other machines manage information for simple domains. - Multiple Master Domain Model -- several master domains communicate with each other. These are consistent with: http://www.networkcomputing.com/netdesign/ntb.html The star and bus topologies both require sharing a resource. This matches sharing a master under all three models. Both the master domain model and the single master domain model fit with this when the shared resource maps to the master. So the master must be the center node in the star. For multilple master domains, one master will have to be a non-center node. This will degrade performance. The ring and mesh topologies do not work well with any of the domains. This is because the domains force central points of communication at the master, which does not correspond with the topology. dogbite-ga``` Request for Answer Clarification by kpss-ga on 21 Apr 2003 09:11 PDT `thank you very much` Clarification of Answer by dogbite-ga on 21 Apr 2003 10:27 PDT ```Excellent -- I'm glad that helped. Has your satisfaction (star rating) increased? :-) dogbite-ga``` Request for Answer Clarification by kpss-ga on 23 Apr 2003 02:49 PDT `how can i increase star rating? (i mean my satisfaction)` Clarification of Answer by dogbite-ga on 23 Apr 2003 07:11 PDT ```I looked at the FAQ, and I don't think it is possible. Oh well -- next time! dogbite-ga``` Request for Answer Clarification by kpss-ga on 24 Apr 2003 13:29 PDT `sorry about that, thanks for help` Clarification of Answer by dogbite-ga on 24 Apr 2003 13:42 PDT ```No problem at all kpss. I'm glad that I could help. dogbite-ga```
 kpss-ga rated this answer: `characteristics i know but "im looking for how DOMAINS are affected by each topology`