上QQ阅读APP看书，第一时间看更新
Coaxial
Coaxial, as in Figure 1.24, is a copper cable presented in two forms: thin coaxial, with a length up to 185 m; and thick coaxial, with a length up to 500 m. In the past, it was used to implement computer networks with the bus and ring physical topologies. Nowadays, it is mainly used by cable Internet Service Providers (ISP) for transferring data and video signal:
Figure 1.24. Coaxial cable