Now it's time to know more about the transmission media
that are used in computer networks.
The media can be wired media using cables or wireless media using
the network. A single network, as you can see in this image, can be composed of a wire port and a wireless part,
most of them in the same network and connected to each other.
uses cables either made of copper or made off fiber optic
copper cables can be quite axle or twisted pair cables
that twisted pair cables themselves can be shielded or unshielded
shell that twister pair STP or unshielded twister pair you TP cables.
The fiber optic cables can use the light signals in single mood, such as the laser mode or in multi mode.
The wireless media wants more, uses the air interface to transmit and receive signals.
The quacks L cables, as you can see in the images composed off
several ports that is ended with an outer jacket.
It's high capacity cables used for video transfer.
There are two types off you Exhale cables Fick who excel cables or thick nut and think oh, Axl cables or thin that
the thick ones are half inch damage.
And there who'd is stunned? Based five. Which means, for example,
the speed is 10 megabits per second, and the maximum distance that can be covered is 500 meters.
The think wechsel cable code is
10 base to, which means the speed is
10 megabits per second and the maximum distance covered these 200 meters.
The diameter of the Thinker Excel cable is quarter inch, while the diameter of the fickle Excel cable is half inch
wolf cables. Use the B and C connectors.
The shield. The twisted pair STP cables are protected through this field
against the electromagnetic interference with other electrical signals.
The STP cables are hard to install due to exist existence. Off this shielding
STP cables use the registration jack or J 45
in the middle of this image.
The Crim fertile, used on the bottom left is used to connect such cables to the registration jack
by pressing on the cable.
Enter inside this restaurant registration drag and be connected to the network's. Afterwards.
The U T P cables or the unshielded twisted pair cables are the most commonly used types.
They are easy to install
Do you know the absence of shielding?
But they are susceptible to electromagnetic interference with other electrical signals. Also, due to the absence of shielding,
U T P uses the registration Jack 45 connected to Audrey, 45 uses the same crimp er tool tow. Connect the registration right through the cables
off the U T P cable determines its capacity. For example, in this image,
cable A has less twisting than cable B.
This makes cable a off less capacity than cable. B
Cable is Cat three you TP cable while cable be escaped. Five You TP cable
and both are made of the same. Material
in the number off twists per meter.
Can hold up to 10 megabits per second. Meanwhile, cable we can hold up 200 megabits per second due to the extra numbering
number off twisting. For this type off cable,
U T P cables are in the stable
cat one or category one is four. Voice only. Telephone wires
speed reaches up 200 megabits per second, which is the first Internet
get five e reaches upto one gigabit per second.
Category six ranges from one gigabit 10 gigabit per second, which is the gigabit Ethernet.
The pin's the terminals off. The you tippy cables are in the colors shown
in the image at the right
brown white, brown, orange, wide, blue, blue, white, orange, green, white, green.
They range from 1 to 8 from bottom to top.
Terminal number one and terminal number two, as shown on the image
on the left, are used for transmission.
Terminal number three and terminal number six are used for receiving.
This is the standard off the U T P cape.
The fiber optic cables transmit light,
It's faster than the twisted pair and the co axial and faster than the copper cables. In general,
it sends data as light policies over glass. Medium.
It is free off electromagnetic interference. Since the pulses are light, not electricity, it's expensive, and it is hard to install
this start off cables can be used in the submarine connections connecting
continents to each other and countries to each other over the Internet.
Fiber off the cables are more secure. They are less susceptible to sniffing
over such type off cables.
The fiber optic cables are composed off core carriers for the signals. This score is made off. Plastic or glass
cladding surrounding the core maintains the signal in the center of the corps.
Even if the cable bends
sheeting that is surrounding the cladding
protects the cladding and the core both
through the outer jacket.
the fiber optic cables molds are the single mode or multi mode
single mode transfer data through the core using a single light ray.
The core diameter is around nine. Micro's supports a large amount of data larger than the multi mode cable.
The cable love can extend a greater distance than the multi moved.
The multi mode cable transfers the data through the core, using multiple light rays. The core diameter is about 15 microns. The cable length
is limited in distance compared to single mode,
which means that the single most cable is a more recent technology and a more expensive technology than the multi move.
The advantage is off. The fiber optic cable is it is totally immune to the E. M I electromagnetic interference, highly resistance to sniffing or eavesdropping
support extremely high data transfer rate. This makes it suitable for submarine cables.
It allows greater cable distance without the need toe repeaters.
The disadvantage is it is very expensive.
It is very difficult to work with and needs very talented to conditions to deal with.
Let's talk about the wireless media using the air interface
the WiFi, which is the abbreviation off the wireless fidelity.
It uses the frequencies off 2.4 gigahertz or five gigahertz.
The standards off the WiFi are
The wife I use is the excess point previously demonstrated in this course tow. Connect the devices wirelessly and to connect the wireless part of the network. Tow the wild port.
When you go wireless, you gain more mobility. You gain more flexibility for the devices connected wirelessly,
but you lose security.
Wireless networks are less secure than the wired networks. They are susceptible to sniffing, since the media used is merely the air, which is exposed to all the users off the network.
By this, we have demonstrated the computer networks, transmission media.