Ntc Week 4 Individual
- Submitted by: Twankie81
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- Date Submitted: 04/01/2012 05:17 PM
- Pages: 7
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Topologies
Bus
The one feature of bus network that defines this topology is the existence of a backbone. Every host on the network (or network segment) is connected to this cable. Although bus networks are the most inexpensive and simplest to install of all the network topologies, one break in the backbone renders the network segment useless. Because each end of the backbone needs to be terminated to prevent signal bounce, a break in the backbone results in the backbone not being terminated and an endless cycle of signal bounce that cripples the network.
Star
The distinguishing feature of a star network is the existence of a central hub that all hosts on the network (or network segment) connect to. Some hubs are passive and forward all network traffic to all hosts on the network, and some hubs are intelligent and forward traffic only to its appropriate destination. Installation of a star network is a bit more expensive than a bus network, but the tradeoff is that a failed network cable does not result in the loss of network connectivity for any other network nodes except the one directly attached to the failed cable. Network connectivity problems can quickly be isolated and corrected. If star networks have a disadvantage, it is that the hub can present a bottleneck in network throughput. Should the hub fail altogether, the entire network (or segment) will lose connectivity.
Ring
Ring networks are distinguished by the fact that each computer is connected to the next in a closed loop. Data packets that are not meant for a specific node are regenerated by the hosts and sent along to the next host on the network until the data reaches its intended destination. Ring networks are also capable of utilizing token passing media access control, but regardless of the method of access control used, ring networks provide equal opportunity for all network nodes to access the transmission medium. One node cannot monopolize a ring network in the same way that can happen on...
Bus
The one feature of bus network that defines this topology is the existence of a backbone. Every host on the network (or network segment) is connected to this cable. Although bus networks are the most inexpensive and simplest to install of all the network topologies, one break in the backbone renders the network segment useless. Because each end of the backbone needs to be terminated to prevent signal bounce, a break in the backbone results in the backbone not being terminated and an endless cycle of signal bounce that cripples the network.
Star
The distinguishing feature of a star network is the existence of a central hub that all hosts on the network (or network segment) connect to. Some hubs are passive and forward all network traffic to all hosts on the network, and some hubs are intelligent and forward traffic only to its appropriate destination. Installation of a star network is a bit more expensive than a bus network, but the tradeoff is that a failed network cable does not result in the loss of network connectivity for any other network nodes except the one directly attached to the failed cable. Network connectivity problems can quickly be isolated and corrected. If star networks have a disadvantage, it is that the hub can present a bottleneck in network throughput. Should the hub fail altogether, the entire network (or segment) will lose connectivity.
Ring
Ring networks are distinguished by the fact that each computer is connected to the next in a closed loop. Data packets that are not meant for a specific node are regenerated by the hosts and sent along to the next host on the network until the data reaches its intended destination. Ring networks are also capable of utilizing token passing media access control, but regardless of the method of access control used, ring networks provide equal opportunity for all network nodes to access the transmission medium. One node cannot monopolize a ring network in the same way that can happen on...