chp4 transmission media
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Transmission MediaTRANSCRIPT
Chapter 4
Transmission Media
Quiz
Please prepare sheet of yellow paper.
Write your name and the date today.
Question #1
What network device that receives a signal and transmits it at a higher level or higher power or onto the other side of an obstruction so that the signal can cover longer distances?
Question #2
? sits between the client application and the real server and intercepts all messages entering and leaving the network and checks if it can fulfill the request itself, if not, then it forwards the request to the real server.
Oypxr vrseer
Unscramble the word in red color to answer this item.
Question #3
What wired transmission cable which consists of multiple, individually insulated wires that are twisted together in pairs?
Question #4
What transmission cable contains a center conductor, made of copper, surrounded by a plastic jacket, with a braided shield over the jacket?
Question #5
What type of network cable that uses a central glass or plastic core surrounded by a plastic coating? It is use to transmit light signals.
Question #6
? refers to the wide bandwidth characteristics of a transmission medium and its ability to transport multiple signals and traffic types simultaneously.
Question #7
What are the two types of Twisted Pair Cables?
Answers
Question #1
What network device that receives a signal and transmits it at a higher level or higher power or onto the other side of an obstruction so that the signal can cover longer distances?
Reapeter
Question #2
? sits between the client application and the real server and intercepts all messages entering and leaving the network and checks if it can fulfill the request itself, if not, then it forwards the request to the real server.
Proxy Server
Unscramble the word in red color to answer this item.
Oypxr vrseer
Question #3
What wired transmission cable which consists of multiple, individually insulated wires that are twisted together in pairs?
Twisted Pair Cable
Question #4
What transmission cable contains a center conductor, made of copper, surrounded by a plastic jacket, with a braided shield over the jacket?
Coaxial Cable
Question #5
What type of network cable that uses a central glass or plastic core surrounded by a plastic coating? It is use to transmit light signals.
Fiber Optic Cable
Question #6
? refers to the wide bandwidth characteristics of a transmission medium and its ability to transport multiple signals and traffic types simultaneously.
Broadband
Question #7
What are the two types of Twisted Pair Cables?
Shielded Twisted Pair (STP)
Unshielded Twisted Pair (UTP)
Chapter 4
TransmissionMedia
TransmissionMedia
TransmissionMediaGuidedUnguided
Physical/Guided
Twisted Pair Cable
Coaxial Cable
Fiber Optic Cable
Twisted-Pair Cable
Generally color coded twisted pairs of insulated copper wires encased in plastic sheath
A thin-diameter copper wire commonly used for telephone and networking cabling.
Twisted-Pair Cable
The two insulated copper wires are twisted around each other to minimize interference (electrical disturbance or noise) from other twisted pairs in the cable.
Twisted-Pair Cable
Charateristics:Relatively inexpensive
Flexible
Easy to install
Easily accomodates different topologies
Generally for analog transmission
Covers limited distance, < 100 meters
Most popular medium for LANs
Twisted-Pair Cable
2 main types:
Unshielded Twisted Pair (UTP)
Shielded Twisted Pair (STP)
Twisted-Pair Cable
Consists of twisted wire pairs that are not only individually insulated, but also surrounded by a shielding made of a metallic substance such as foil.
Sometimes braided copper shielding
Acts as barrier to external Electromagnetic forces
Twisted-Pair Cable
Twisted-Pair Cable
Standard connector
RJ45 male connector
RJ45 female adoptor
Physical/Guided
Twisted Pair Cable
Coaxial Cable
Fiber Optic Cable
Coaxial Cable
Coax for short
Made of wire which carry radio or television signals.
Coaxial Cable
Common in cable television applications.
The cable is designed to carry a high-frquency or broadband signal.
Can carry signals for longer distances than twisted-pair
Less susceptible to electromagnetic interference
Coaxial Cable
Used BNC (Bayone-Neill-Concelman) connector
Named after its Bayonet mount locking mechanism and its inventors: Paul Neill and Carl Concelman
Coaxial Cable
Two types of coaxial cable:
Thin Coaxial Cable
Thick Coaxial Cable
Physical/Guided
Twisted Pair Cable
Coaxial Cable
Fiber Optic Cable
Fiber Optics Cable
A thin glass strand designed for light transmission.
The core consists of dozen or hundreds of thin strands or plastic that use light to transmit signals.
Transmit data up to 2Gbps.
Fibers allow longer distances to be spanned before the signal has to be regenerated by expensive repeaters.
Fiber Optics Cable
Fiber optic cable is very expensive.
It is hard to install and modify and requires highly skilled installers.
Fiber Optics Cable
Following are the fiber optics components:1. core4. coating2. cladding5. strengthening3. cable jacket
TransmissionMediaGuidedUnguided
Unguided
Wireless transmission mediaBroadcast Radio
Cellular Radio
Microwaves
Satellites
Infrared
Assignment
Search for the meaning of the following unguided transmission media. This time include the source where you got the information. Information from Wikipedia will not be accepted.
Broadcast Radio
Cellular Radio
Microwaves
Satellites
Infrared
Due on: Thursday, Feb. 06, 2014
Quiz
Please prepare sheet of yellow paper.
Write your name and the date today.
Question #1
We have two (2) types of transmission media: guided/physical and unguided, to which medium does transmitts data through high frequency radio signals or infrared light beams belong?
Question #2
Broadcast Radio, Cellular Radio, Microwaves, Satellites or Infrared, what wireless transmission media distributes radio signals through the air over long distances which is also known as one-way wireless transmission over radio waves intended to reach a wide audience?
Question #3
AM stands for ?
Question #4
FM stands for ?
Question #5
Satellite is artificial object which has been intentionally placed into orbit. This receives microwave signals, amplifies it and then broadcast it back to earth which then received by the satellite dish. So, what is the natural satellite that orbits the earth?
Answer
Answer #1
We have two (2) types of transmission media: guided/physical and unguided, to which medium does transmitts data through high frequency radio signals or infrared light beams belong?
Unguided / wireless
Question #2
Broadcast Radio, Cellular Radio, Microwaves, Satellites or Infrared, what wireless transmission media distributes radio signals through the air over long distances which is also known as one-way wireless transmission over radio waves intended to reach a wide audience?
Broadcast Radio
Question #3
AM stands for ?
Amplitude Modulation
Question #4
FM stands for ?
Frequency Modulation
Question #5
Satellite is artificial object which has been intentionally placed into orbit. This receives microwave signals, amplifies it and then broadcast it back to earth which then received by the satellite dish. So, what is the natural satellite that orbits the earth?
Moon
Unguided
Broadcast Radio
Cellular Radio
Microwaves
Satellites
Infrared
Broadcast Radio
Distributes the radio signals through the air over long distances
It is used with AM, FM radio, television station, Citizens Band radio
Slower and more susceptable to noise than physical transmission media but it provides flexibility and portability
Broadcast Radio
Radio setup has two parts:Transmitter
Receiver
Unguided
Broadcast Radio
Cellular Radio
Microwaves
Satellites
Infrared
Cellular Radio
Form of broadcast radio used for mobile communication
Transmission speeds range from 9.6Kbps to 2Mbps
Unguided
Broadcast Radio
Cellular Radio
Microwaves
Satellites
Infrared
Unguided
Broadcast Radio
Cellular Radio
Microwaves
Satellites
Infrared
Microwaves
Also called as Fixed-Point Wireless
High frequency radio waves that provide high-speed transmission
Signals are sent from one microwave station to another
Microwaves
Limited to line-of-sight transmission
This means that microwave antennas must be placed in high places
Unguided
Broadcast Radio
Cellular Radio
Microwaves
Satellites
Infrared
Satellites
A space station that accepts microwave signals from an earth base station, amplifies the signals then broadcasts the signals over a wide area
Unguided
Broadcast Radio
Cellular Radio
Microwaves
Satellites
Infrared
Infrared
Sends signals using infrared light waves
Use line-of-sight transmission
Signals only travel for short distances
Remote controls and IrDA devices use infrared light-emitting diodes (LEDs) to emit infrared radiation that is focused by a plastic lens into a narrow beam. The beam is modulated, i.e. switched on and off, to encode the data. The receiver uses a silicon photodiode to convert the infrared radiation to an electric current. It responds only to the rapidly pulsing signal created by the transmitter, and filters out slowly changing infrared radiation from ambient light.