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While answers to these questions will vary somewhat from one user organization to another and from vendor to vendor, there are some essential characteristics that every solution must have. For example, it is generally true that any answer to the bandwidth problem should be standards-based and of higher performance than either Ethernet or Token Ring. Fortunately, there exists a stable standard that fits the bill, namely Fiber Distributed Data Interface (FDDI), which makes it a logical choice as the basis for improving overall bandwidth. In addition to FDDI, more specific characteristics effectively define the design criteria for a Tiffany 1837 Collection Set generation hub; these additional characteristics include:

* seamless migration from Ethernet or Token Ring to FDDI. This in turn requires support for multiple network types such as Ethernet, Token Ring, and FDDI, and communications between them. Even though in many organizations one finds only two of the three network types, support for all three must be Paloma's X Earrings and Necklace Set to accommodate the range of equipment that may be found in today's corporate computing environments;* support for high-speed workstations, file servers, and hosts;* greater ability to isolate segments from unnecessary traffic to improve overall network performance;* enhanced flexibility and simplicity in network design and planning accomplished by providing both segment-to-segment and network type-to-network type internetworking right within the hub.

Although many potential designs will satisfy these criteria, for the purposes of this article it makes more sense to choose one idealized, highly simplified, and schematic design and show how it can be incorporated into a functional network. This hub design is based Heart Tag Toggle Link Set a back-plane that includes 100-Mbps FDDI media, to supply an order of magnitude increment in bandwidth over 10-Mbps Ethernet, or 4-or 16-Mbps Token Ring.

The ideal third generation hub includes modules providing wiring concentration, along with internetworking and network management functionality. Illustrations of these modules appear in appropriate figures to show how they can be added to the hub to Tiffany Cushion Toggle Necklace and Bracelet Set expanding network architectures.

As noted above, even networks built from scratch are likely to include new smart hub technology for cost reasons. Like existing networks, new networks must often provide a variety of performance levels. Using nothing but third generation hubs in a brand new network design would be prohibitively expensive. Since both scenarios require combining third generation hubs and smart hubs in a single topology, the problem of incorporating third generation hubs into a new network presents the same challenges as incorporating them into existing networks.

Existing networks, such as in Figure 1, may need to be upgraded to Tiffany Notes "I Love You" Heart Lock Charm Set the bandwidth that continuing network growth and new network applications will require. (Figure 1 omitted) When confronted with bandwidth demand, the network manager has the following choices:

* replace all existing networking equipment (e.g., hubs, adapter cards, etc.). This is equivalent to designing a new network with nothing but third generation hubs: while it delivers unprecedented performance, it is almost certain to be prohibited by its high cost.

* restructure the network by incorporating third generation hubs along with the Tiffany Atlas Woman Dome Watch equipment. That requires a way to connect any existing hubs to the FDDI backplanes of the third generation hubs.