200-301: Cisco Certified Network AssociateDemo

Copper cabling in Ethernet networks is twisted-pair media and is available in unshielded and shielded forms, so that characteristic belongs to copper. Copper is also the common choice for small office LAN runs. Multimode fiber is widely used for short, high-speed links inside buildings and datacenters. Compared with single-mode fiber, multimode fiber has higher modal dispersion and attenuation over longer distances, which is why it is generally limited to shorter-distance datacenter-style links.