Enhancing LAN performance by Gilbert Held

By Gilbert Held

Bettering LAN functionality, Fourth version explains tips on how to attach geographically separated LANs with applicable bandwidth, the problems to think about while weighing using multiport or dualport units, how you can estimate site visitors for brand spanking new networks, the consequences of configuration adjustments at the functionality of Ethernet and Token Ring networks, the layout of switch-based networks that hinder site visitors bottlenecks, and different serious themes. It presents the instruments to deal with those matters with regards to particular community requisites. This quantity develops mathematical types of varied LAN functionality concerns, permitting LAN managers to figure out the solutions which are correct for his or her corporations.

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These and other issues can be considered to represent a core set of operational issues you will want to answer to ensure that your networks not only meet the requirements of your user community but, in addition, are not overconfigured. Concerning the latter, as sure as the sun rises in the East, you will never hear an end user complain that network performance is too good. Thus, you will more than likely never be told that you overconfigured your network or transmission facilities used to interconnect networks, although doing so can result in a considerable expenditure of Page xvi funds beyond those necessary.

As might be expected from the previous paragraph, the initial focus of Chapter 8 is on the development of a model to reflect the flow of frames on a Token Ring network. Once this is accomplished, the model will be exercised to determine the frame carrying capacity of a Token Ring network under different operating conditions and network configurations. The development of a Token Ring traffic model will require consideration of a large number of operating conditions and network configuration data.

3 and Ethernet frames with respect to field length. In addition, each field can consist of two or more subfields whose settings govern such network operations as the type of addressing used on the LAN and whether or not the frame is addressed to a specific station or to more than one station. 3 standard as one of the two field formats applicable to Ethernet. 2 illustrates the composition of the source and destination address fields. 3 networks. 3 equipment, all stations on the LAN must use the same addressing structure.

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