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Showing posts with the label Lecture 3

Lecture 3(b) :Wireless Networking(Unguided Media)

 The three broad categories of wireless media are: 1.         Radiowave - 10 Khz to 1 Ghz. It is broken into many bands including AM, FM, and VHF bands.  The Federal communications Commission (FCC) regulates the assignment of these frequencies.                    Frequencies for unregulated use are:                   902-928Mhz - Cordless phones, remote controls.                   2.4 Ghz                   5.72-5.85 Ghz 2.         Microwave                Terrestrial - Used to link ne...

Lecture 3(a) :Transmission Media

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Media:   Sending of data from one device to another is called transmission of data , Medium used to transmit the data is called Media like (Cables,Waves,Laser). Transmission of data through Medium is called Transmission Media. Types of Media:     Guided (Wired)     Twisted Pair ,Coaxial cable, Fiber Optics .        Unguided (Wireless)                 Radio waves,Microwaves,Infared waves.  Lets Start From Guided Media: Cable are divided into three types according to their speed, cost, need etc. 1. Twisted pair cable 2. Co-axial cable 3. Fiber optic cable 1. TWISTED PAIR CABLE: A twisted pair wire consist of two bunches of thin copper wire and enclosed separately in a plastic insulator with conductor. One the wire is used to...