By Matthew J Castelli
This source for community experts and engineers offers recommendation on auditing, examining, and comparing any community setting. It demonstrates the place and the way to collect correct details and the way to investigate it, and overviews the expertise at each one layer of the community. There are chapters at the open approach interconnections version, LAN topologies, Ethernet, FDDI, telecommunications and telephony, body relay WAN research, and voice know-how. different issues contain distant entry, routing protocols, and multiprotocol label switching. pattern varieties for community auditing and documentation are integrated. Castelli is a expert and company community layout engineer for a world telecommunications integrator.
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3) networks. The spanning tree algorithm disables loops in what would otherwise be a looped topology. Spanning tree expands through the network and ensures that only one active path exists between any two LAN-attached stations. Figure 2-8 is an example of a tree topology. Figure 2-8. Tree Topology LAN Topologies Four LAN topologies exist: • • • • Star (Hub-and-Spoke) Ring Bus Tree Star (Hub-and-Spoke) Topology All stations are attached by cable to a central point, usually a wiring hub or other device operating in a similar function.
Figure 2-7. Bus Topology Tree Topology The tree topology is a logical extension of the bus topology and could be described as multiple interconnected bus networks. The physical (cable) plant is known as a branching tree with all stations attached to it. The tree begins at the root, the pinnacle point, and expands to the network endpoints. This topology allows a network to expand dynamically with only one active data path between any two network endpoints. A tree topology network is one that does not employ loops in its topology.
3u study group. 100BaseT is also known as Fast Ethernet. Variations of this type are 100BaseT4, 100BaseT2, 100BaseTX, and 100BaseFX. 5/125 microns optical fibers. 100BaseT2 A 100 Mbps network physical layer specification that uses two pairs of Category 3 or higher shielded twisted-pair (STP) or unshielded twisted-pair (UTP) wire. 100BaseT4 A 100 Mbps network Physical-layer specification that uses four pairs of Category 3 or higher STP or UTP wire. 100BaseT4 uses an 8B/6T data-translation scheme.
Network Consultants Handbook by Matthew J Castelli