21-01-2013, 04:18 PM
Network Topology and Design
Network Topology.ppt (Size: 3.22 MB / Downloads: 54)
Objectives
Discuss the different physical topologies
Determine which type of network media to use given a set of requirements
Understand horizontal cabling standards and wiring closets
Consider performance requirements and improvements for given situations
Install a telecommunications connector
Physical Topologies:Bus
Bus topology advantages:
It is inexpensive
It is easy to design and implement because the stations are simply daisy-chained together
Bus topology disadvantages:
It is difficult to troubleshoot
It requires termination
Physical Topologies:Star
The star network configuration is the most popular physical topology
In a star configuration, all computers or stations are wired directly to a central location:
Concentrator (a.k.a. hub)
Multistation Access Unit (MAU)
A data signal from any station goes directly to this central device, which transmits the signal according to the established network access method for the type of network
Physical Topologies:Ring
Physical rings
Most often seen in Fiber Distributed Data Interface (FDDI) networks
FDDI is a WAN technology
Stations on a ring are wired to one another in a circle around the entire network
Twisted-Pair Cabling
Common traits of all twisted-pair cabling types and categories:
The wires are copper
The wires come in pairs
The pairs of wires are twisted around each other
The pairs of wires are usually enclosed in a cable sheath individually and as a group of wires
Unshielded Twisted-Pair (UTP)
UTP advantages:
Thin flexible cable that is easy to string between walls
Most modern buildings come with CAT 5 UTP already wired into the wall outlets or at least run between the floors
Because UTP is small, it does not quickly fill up wiring ducts
Costs less per foot than other type of LAN cable