Guided & unguided media

Transmission media are usually categorized as -----------

------- cable consists of an inner copper core and a second conducting outer sheath.

The inner core of an optical fiber is made of --------

------- cable consists of two insulated copper wires twisted together

------- cable is used for voice and data communications

------- cable carry data signals in the form of light

In a fiber optic cable,the signal is propagated along the inner core by -------

Radio waves are --------- directional

------- waves are used for cellular phone,satellite and wireless LAN communication

------- waves are used for short range communication such as those between a PC and a peripheral device.