NET 101 MODULE 4 Flashcards
A means by which a communication signal is carried from one system to another.
TRANSMISSION MEDIUM
can be defined as
anything that can carry information from a
source to a destination.
transmission medium
uses a cabling system that guides the data signals along a specific path.
GUIDED MEDIA
also known as Bounded media, which are those that provide a conduit from one device to another.
Guided media
Types of Guided media?
Twisted Pair Cable
Coaxial Cable
Fiber Optic Cable
Consist of insulated strands of copper wire twisted together to form a single media.
Twisted pair cable
What is the transmission rate of Twisted Pair Cable?
10-100 Mbps
Twisted Pair Cable Transmission of signals take place in?
Electrical Form
What is the maximum cable length of Twisted Pair Cable?
100 meters
Comes with twisted wire pair covered in metal foil. This makes it more indifferent to noise and crosstalk.
Shielded Twisted Pair Cable
A type of copper telephone wiring in which each of the two copper wires that are twisted together are coated with an insulating coating that functions as a ground for the wires.
Shielded Twisted Pair Cable
A popular type of cable that consists of two unshielded wires twisted around each other.
Unshielded Twisted Pair Cable
Due to its low cost, ___ cabling is used
extensively for local-area networks (LANs) and
telephone connections.
UTP/Unshielded Twisted Pair
does not offer as high bandwidth
or as good protection from interference as
coaxial or fiber optic cables, but it is less
expensive and easier to work with.
Unshielded Twisted Pair Cable
Protects the copper wire from physical damage.
Outer Jacket
Protects the signal from interference.
Twisted Pair
Parts of Shielded Twisted Pair.
Outer Jacket
Overall Shield
Pair Shields
Twisted pair
Isolates wires from each other and identifies each pair.
Color-Coded Plastic Insulation
UTP Categories
CAT1 - 8
Consists of a center wire surrounded by insulation and then a grounded shield of braided wire. The shield minimizes electrical and radio frequency interference.
Coaxial Cable
Although more expensive than standard telephone
wire, it is much less susceptible to interference and
can carry much more data.
Coaxial Cable
Transmission rate of Coaxial Cable?
100 Mbps
Maximum cable length of Coaxial Cable?
185 meters Thinnet, 500 meters Thicknet.
Parts of Coaxial Cable
Plastic Jacket
Metallic Shield
Dielectric insulator
centre core
A technology that uses glass (or plastic) threads
(fibers) to transmit data.
Fiber Optic Cable
Consists of a bundle of hair-thin strands of glass or plastic that carry data as pulses of light.
Fiber Optic Calbe
Transmission rate of Fiber Optic Cable
10 mbps - 100 gbps
maximum cable length of fiber optic cable?
2 km - 100 km
How does transmission signal takes place in Fiber Optic Cable?
optical form over a glass fiber
parts of fiber optic cable
Outer Jacket
Strength Member
Coating
Cladding
Core
Twisted Pair PROs:
Most flexible
Cheapest cable
Easy to install & easy to add users
Twisted Pair CONs:
Shortest usable cable length
Susceptible to electrical interference
Short circuit between two conductor is possible
Low bandwidth
COAXIAL CABLE PROs:
Flexible & easy to install
Relatively good resistance to electronic interference
It can span longer distance at higher data rates
COAXIAL CABLE CONs:
Short cable length
More expensive to install compare to UTP
Hard to change configuration
FIBER OPTIC CABLE PROs:
Small size and light weight
No electrical or electromagnetic interference
High Bandwidth
No cross talk inside the optical fiber cable. Signal can
be sent up to 100 times faster
Secure
Short circuit is not possible
FIBER OPTIC CABLE CONs:
Most expensive
Difficult to install
Transport data without using a physical
conductor.
UNGUIDED MEDIA
This type of communication is often
referred to as wireless transmission.
UNGUIDED MEDIA
It uses wireless electromagnetic signals to send
data.
UNGUIDED MEDIA
Wireless
signals are spread over in the air and are
received and interpreted by appropriate
antennas.
UNGUIDED MEDIA
is a wireless transmission medium that sends
signals using infrared light waves
Infrared Transmission
Infrared Transmission frequencies?
300 GHz - 400 THz
having high frequencies, cannot
penetrate walls
Infrared Waves
It has a short range communication
Infrared Transmission
a form of electromagnetic transmission used in
wireless communication
Radio Frequency Transmission
These are used in wireless communication because of their property to penetrate through objects and travel long distances
Radio Frequency Transmission
RF signals frequency
3kHz - 300 GHz
distributes radio signals through the air over long distances
such as between cities, regions, and countries and short
distances such as within an office or home.
Radio waves Transmission
Radio waves can have wavelength from
1mm - 100,000km
Radio waves frequencies
3kHz - 1 GHz
Example of Radio Waves Transmission
Bluetooth, UWB, Wi-Fi, and WiMAX
It is a omnidirectional (send out signals in all directions) Transmission
Radio Waves Transmission
are radio waves that provide a high-speed signal transmission.
Microwaves
often called fixed wireless, involves
sending signals from one microwave station to another
Microwave Transmission
Wavelength of Microwave Transmission
1mm - 1meter
microwave Transmission frequencies
300 MHz to 300 GHz
It is a Unidirectional (line of sight) Transmission
Microwaves Transmission
electromagnetic radiation with a wavelength
ranging between infrared radiations and ultraviolet
radiations.
Light Wave Transmission
Wavelength range of Light Wave Transmission
430 to 750 THz
These are unguided optical signals such as
laser and are unidirectional.
Light Wave Transmission
IEEE Standards:
802.11a
802.11b
802.11g
802.11n
802.11ac
802.11ax
What are the speeds of these?
802.11a
802.11b
802.11g
802.11n
802.11ac
802.11ax
54 Mbps
11 Mbps
54 Mbps
600 Mbps
1.3 Gbps
10-12 Gbps
