Answer Posted / abhay sunder

all depends on ur requirement:---
for eg:for local need ie if u want to use cctv cameras with ur networks...let say ,,so requirement is small then u use a BUS topology becoz that is of low cost...
but if u r using large networks then STAR is prefered...(in companies).but it is costier.....COST also matters a lot......

regarding wires:for shorter distances ie within 100-600-800metres twisted wires are used .......for longer distances coaxial cables are used.......even u can use coaxial 4 shorter diastances but with twisted pair interference is less(becoz interference is balanced for both wires in case of twisted which is RG-59 standard with 75ohm )

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