HardwareCentral - Ultimate Guide to Networking: Part One.

Ultimate Guide to Networking: Part One

Local-Area Networks

May 29, 1999
By Michael Furdyk

Originally, only medium to large-sized businesses could afford the cost of networking hardware. In the last decade, prices have rapidly dropped as new technology has developed, and it is now possible to grab a basic 4-PC 10Base-T home networking kit for under $150. The affordable price and added convienence of having a LAN has made it commonplace to see networks in many homes and offices. Each PC in a LAN is able to access shared files and devices anywhere on the LAN. This makes the sharing of expensive devices, such as laser printers or large removable storage drives, a cost-effective alternative to purchasing a device for every user.

If you decide to use Ethernet for your LAN (which we recommend you do), you can choose from 10Base-T (10 million bits per second, or 10 Mbps) or 100Base-T (100 million bits per second, or 100 Mbps), which is usually refered to as Fast Ethernet. 10Base-T is used mostly for home and small office networks, because it offers both affordability (around $20-30 for a network card, and $80 for an 8-port hub) and decent performance. For large businesses, a 100Base-T solution may be required if there are a large number of PCs connected to the network, or if large amounts of data is frequently transferred.

There are three different types of cabling for Ethernet networks. Unshielded Twisted Pair (UTP) is the most popular type of cabling, and the one we recommend because of its wide availibility and low price. The other two types are coaxial and Shielded Twisted Pair (STP). STP cable provides more shielding against outside Electromagnetic Interference (EMI) than UTP, but is more expensive. We've never had any problems with EMI, so we suggest the cheaper UTP. Coaxial uses much thicker and more expensive cable, and must be run in a ring configuration, from PC to PC, unlike Twisted Pair, which is run directly from each computer to a port on the hub, making wiring more convienent in most cases.

Ethernet networks require a Hub, a hardware device that all PCs on a network are connected to by cabling. The hub manages receiving and transmitting data from networked devices. Hubs come in many different port configurations, but you will probably need a 4, 8, or 12 port hub, depending on the number of PCs you want to connect together. Each port supports a single 10Base-T connection from a PC or peripheral. If you're using Coaxial cable, you need to find a hub with one Coaxial port and minimal Twisted Pair ports. There are both Manageable Hubs, which allow advanced configuration of Hub properties via a software package, and Standard Hubs, which are cheaper, and usually used for home or small office networks. We recommend purchasing a standard hub, since the extra features included in Manageable Hubs are not useful for a home or small office network. Since you will probably purchase a standard hub, we'll discuss the three types of standard hubs next.

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