Transmission media (data communication)
-
Upload
pritom-chaki -
Category
Engineering
-
view
30 -
download
2
Transcript of Transmission media (data communication)
![Page 1: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/1.jpg)
TRANSMISSION MEDIA
![Page 2: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/2.jpg)
Guided Transmission media Transmission Media Guided Media Types of Guided Media1. Twisted Pair cable2. Coaxial Cables3. Optical Fiber Unguided Media
Topic Included
![Page 3: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/3.jpg)
What is Transmission Media
Sending of data from one device to another through Medium is called Transmission Media
Transmission Media
Guided Unguided
![Page 4: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/4.jpg)
Guided (Wired)
Guided transmission media means the data signals are guided along the path like cabling system .
![Page 5: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/5.jpg)
Types Of Guided Media
Guided (Wired)
Twisted Pair Coaxial cable Fiber Optics
Guided Media
Twisted Pair Co-Axial Cables Optic fibres
![Page 6: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/6.jpg)
Twisted Pair Wires
Consists of two insulated copper wires arranged in a regular spiral pattern to minimize the electromagnetic interference between adjacent pairs
Often used at customer facilities and also over distances to carry voice as well as data communications
Low frequency transmission medium
![Page 7: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/7.jpg)
Types of Twisted Pair
STP (shielded twisted pair) the pair is wrapped with metallic foil or braid to insulate the pair from
electromagnetic interference UTP (unshielded twisted pair)
each wire is insulated with plastic wrap, but the pair is encased in an outer covering
![Page 8: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/8.jpg)
Twisted Pair Advantages Inexpensive and readily available Flexible and light weight Easy to work with and install
Disadvantages Susceptibility to interference and noise Attenuation problem Relatively low bandwidth (3000Hz)
![Page 9: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/9.jpg)
Coaxial Cable (or Coax)
Used for cable television, LANs, telephony Has an inner conductor surrounded by a braided mesh Both conductors share a common center axial, hence the term “co-
axial”
![Page 10: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/10.jpg)
Coax Advantages Higher bandwidth
400 to 600Mhz up to 10,800 voice conversations
Can be tapped easily (pros and cons) Much less susceptible to interference than twisted pair
Coax Disadvantages High attenuation rate makes it expensive over long
distance Bulky
![Page 11: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/11.jpg)
FIBER OPTIC Cable• Optical fiber consists of a glass
core, surrounded by a glass cladding with slightly lower refractive index.
• In most networks fiber-optic cable is used as the high-speed backbone, and twisted wire and coaxial cable are used to connect the backbone to individual devices.
![Page 12: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/12.jpg)
Fiber Optic Layers
consists of three concentric sections
![Page 13: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/13.jpg)
Fiber Optic Advantages greater capacity (bandwidth of up to 100 Gbps) smaller size and lighter weight lower attenuation immunity to environmental interference highly secure due to tap difficulty and lack of signal radiation
![Page 14: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/14.jpg)
Fiber Optic Disadvantages
Expensive to install requires highly skilled installers adding additional nodes is difficult
![Page 15: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/15.jpg)
Unguided Media
Wireless transmission waves
![Page 16: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/16.jpg)
Radio Waves
Omnidirectional Antenna
Frequencies between 3 KHz and
1 GHz. Are used for multicasts communications, such as radio and television, and paging system.
![Page 17: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/17.jpg)
Microwaves
17
frequency between 1 and 300 GHz
Micro waves are unidirectional.
Very high frequency Micro waves can not penetrate walls.
They are used in Cellular phones, satellite networks, wireless LANs.
![Page 18: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/18.jpg)
Infrared
Frequencies between 300 GHz to 400 THz. Can not penetrate walls. Used for short-range communication Typical uses
TV remote control IRD port
Are blocked by walls No licenses required
![Page 19: Transmission media (data communication)](https://reader031.fdocuments.net/reader031/viewer/2022030309/58f147921a28ab9c608b45f9/html5/thumbnails/19.jpg)
THANK YOU