Microsoft Certified Systems Engineer (MCSE) Question:

UTP - unshielded twisted pair 10BASE-T is the preferred Ethernet medium of the 90s. It is based on a star topology. It provides a number of advantages over coaxial media.

It uses inexpensive, readily available copper phone wire. UTP wire is much easier to install and debug than coax. UTP uses RG-45 connectors, which are cheap and reliable.