![]() | Technology Reference Guide 2. Hardware N. Network Adaptors/Cabling |
| What is it? Network adapters and cabling are the physical foundation of the network. Each device on the network has to have a network adapter, known variously as a NIC (network interface card), network adapter, Ethernet (or Token Ring) card, etc. These adapters are made for a specific bus (ISA, EISA, NuBus, or PCI), a specific cable type (Token Ring, Ethernet coax, or twisted pair) and a specific data link protocol (Ethernet, Token Ring). Each type network has a specific type of cabling for which it is designed. The cabling is also designed to connect network nodes together in a specific fashion, known as its topology. For example, Token Ring and FDDI networks are designed to be connected in a circle (ring topology). Ethernet networks using coaxial cable are connected in a straight line (bus topology), whereas Ethernet networks using twisted pair cable are connected in a hub and spoke arrangement (star topology).
What does it do? A cable system, known as a cableplant forms the circulatory system of a network, much the same way as a plumbing system, or electrical power system distributes its services. Cabling is subject to certain rules and limitations in order to function reliably. For example, there are rules governing the maximum length of a network segment, the maximum overall length of a network, and the maximum number of nodes that can be attached. Failure to follow these rules leads to some of the most illusive and troublesome network reliability problems. How is it used? Where do I get more information? |