Guided Media uses a "cabling" system that guides the data signals along a specific path. The data signals are bound by the "cabling" system. Guided Media is also known as Bound Media.
Unguided Media consists of a means for the data signals to travel but nothing to guide them along a specific path. In a guided medium signal passes through a physical pathway(s),while in an unguided medium signal passes through a vacuum, it is independent of a physical pathway.
Summary: Guided media is a technique that is wired whereas unguided media is a wireless technique.