1.- a topology is a usually schematic description of the arrangement of a network, including its nodes and connecting .and it is the physical interconnections of the elements (links, nodes, etc.) of a computer network. A local area network (LAN)
2.-The study of network topology recognizes four basic topologies: ..... by definition, the term 'logical topology' refers to the apparent path that .... Two common examples for Hybrid network are: star ring network and star bus network .and also..Computer networks may be classified according to the network topology upon which ... Some examples of devices that are used in a PAN are personal computers, .... MAN, WAN, or other type of network, although, by definition, an extranet................http://www.google.com.ph/imgres?imgurl=http://www.timboucher.com/journal/wp-content/uploads/2009/02/network-topology.jpg&imgrefurl=http://www.timboucher.com/journal/2009/02/17/molecular-structure-sacred-geometry-correlations-and-connections-information-encoded-in-matter/&h=281&w=437&sz=32&tbnid=GeiOy0wBC8fR5M:&tbnh=81&tbnw=126&prev=/images%3Fq%3Dpicture%2Bof%2Bnetwork%2Btopology&hl=tl&usg=__IN2kRrSNpDmO1b58VqcRgo3BhSI=&ei=iwRyS7TBDojmswP9o4GnCA&sa=X&oi=image_result&resnum=1&ct=image&ved=0CAcQ9QEwAA