depend on how much budget, you can do fiber and multiplexes , or just cooper , depend is for data or phone? how much is the traffic?, this is a too open question that is more related to the bugdet that anything.
greater distances per cable run limited susceptibility to EMI/RFI greater bandwidth potential
der, electrocution?
copper cable
There are different types of gibabit Ethernet; the cabling can either be some kind of copper cable, usually UTP, or fiber optic.
Fiber optics carry vastly more information than ordinary cables, for a given thickness of cable.
Copper is preferable to aluminum and the size of wire should be the same or the next size down if copper is used.
Copper is a conductor, which means it conducts heat more quickly, hence heating up faster. The same reason is for why copper is used in electricity cabling.
Vertical Cabling - Runs between floor to floor. It is used for Core to Distribution (or Access) switch connectivity. Usually consists of fiber cables Horizontal Cabling - Runs on one floor. Runs from Distribution or Access switches to the end user. Usually copper.
It's Cheaper
Copper
This is copper's version of oxidisation. It occurs very visibly on buildings with copper trim on the roofs.
Any shielded copper cable or fiber optic cable.