Respond to discussions homework

Respond to discussion 150 words minimum

Transmission mediums used in networking are responsible for carrying data over a given length of space. The medium can be wired or wireless. Many people use wireless technologies in their businesses and homes. Large businesses and corporations use a combination of wired and wireless technology. Some wired technologies are more expensive than others. Consequently, wired technologies like fiber optics offer extremely high speed data transmission. Cheaper technologies use coax cables and twisted pair wires. Higher grades of twisted pair wires can provide transmission speeds of up to 10 Gbps at 600 MHz (2012).

            Free space transmission mediums include infrared transmission, short-range wireless, satellite, and microwave transmission. Orthogonal Frequency Division Multiplexing is a modulation technique used in wireless standards, including the 802.11n standard. OFDM has been adopted by many broadcasting standards. OFDM provides high data rates using equally spaced signals that carry their own payload. There are different variations of OFDM, including Vector OFDM. VOFDM uses Multiple Input Multiple Output modulation. MIMO uses multiple antennas to transmit multiple signals to enhance connectivity (Poole, 2016).

References

Poole, Ian. (2016) OFDM Orthogonal Frequency Division Multiplexing Tutorial. Retrieved from http://www.radio-electronics.com/info/rf-technology-design/ofdm/ofdm-basics-tutorial.php.

CIW.  (2012) Transmission media. CertPress, LLC. Retrieved from http://ezproxy.apus.edu/login?url=http://ebooks.apus.edu/ISSC340/CIW_2012_Lesson06.pdf

-Dylan

Respond to discussion 150 words minimum

Transmission cabling and techniques have evolved a lot over the years. Looking at the early days of the AT&T network, it all started with copper wire sent down telephone poles back in 1892. Copper wire will actually tend to lose its signal over long distances so the wire were made thick. about 1/6 inch thick. To increase the distances the signals could be sent other technologies were created. They added loading coils in 1904 and then in 1914 they added vacuum tube repeaters which helped in amplify the signal as it was sent down the wire. Latter on they wanted to increase the types of services they could offer they started using the coaxial cabling to provide television service. the first coaxial cable was laid in 1936 between New York and Philadelphia. At the same time Microwave radio relay was developed and able to send as many as 2,400. As early as 1980 fiber optics started being developed. Fiber optics uses pules of light to send the signals and it is extremely fast. Other technologies that currently exist are things like Orthogonal Frequency Division Multiplexing. This type of multiplexing is extremely more resistant to frequency selective fading then other types of systems.  it works by receiving the signal then side banding it then the receiver uses a filter to pick out the signal. In the future I see everything changing to wireless. As we enhance our drone capabilities I see drones constantly flying around and delivering a signal for everything down below.

 

History of the AT&T Network: History of Network Tranmission| History| AT&T. (n.d.). Retrieved from http://www.corp.att.com/history/nethistory/transmission.html

What is OFDM | Orthogonal Frequency Division Multiplexing | Radio-Electronics.com. (n.d.). Retrieved from http://www.radio-electronics.com/info/rf-technology-design/ofdm/ofdm-basics-tutorial.php

 -Clinton