Ø   Unbound transmission media are the ways of transmitting data without using any cables . Ø   These media are not bounded by physical geography .  Ø   This type of transmission is called Wireless communication. Ø   Nowadays wireless communication is becoming popular. Wireless LANs are being installed in office and college campuses. This transmission uses  Microwave, Radio wave, Infra-red are some of popular unbound transmission media. Ø   Wireless communication involves no physical link established between two or more devices, communicating wirelessly. Ø   Electro-magnetic signals are spread over in the air and are received and interpreted by appropriate antennas . Note: Electro-magnetic waves are special type of wave that can travel without medium. Ø   When an antenna is attached to electrical circuit of a computer or wireless device , it converts the digital data into electromagnetic signals and spread all over wi...

Ø   Bound transmission media are the cables that are tangible or have physical existence and are limited by the physical geography .  Ø   Popular  bound transmission media  in use are twisted pair cable, co-axial cable and fiber optical cable. Ø   Each of them has its own characteristics like transmission speed, effect of noise, physical appearance, cost etc.  Ø   They will transmit the data in the form of electrical signals. 1) Twisted Pair Cable: Ø   A twisted pair cable is made of two identical wires twisted together to form a single media . Ø   Out of these two wires, only one carries actual signal (Conductor) and another is used for ground reference (Insulator). Ø   The twists between wires are helpful in reducing noise and crosstalk (Bleeding of signal from one wire to another i.e.) Ø There are two types of twisted pair cables: ·      Shielded Twisted Pair (STP) Cable ·  ...