...cables on networks I need lots of detail please??????

Terminators may come looseT connectors may fail (i.e. stop connecting)Solid core cable may fracture due to fatiqueall will bring the network downother security issues e.g. hacking and virus' are not to do with the physical medium but the logic of the nework

Some people might choose to use "vampire taps" - devices thata are created to physically tap into the line and gather data that is being transmitted. That's why you should use fiber optics cable that is more secure.