Vision Computer Academy

Hello friends here we will learn about Networking

What is networking?

Ans:- A group of nodes/devices are connected to each other where as they shared resources between them known as networking...or

Transferring data from one node to another is called as networking......

What is netwok?

Ans:- A group of nodes/devices connected with the help of transmission media is known as network....

What is transmission media?

Transmissions media is nothing but it is an entry and exit point of data passing from source to destination. Or

With the help of transmission we can established communication between devices...

it may be Wired or wireless entities of data passing.......between the devices......

There are two types of transmission media
1.physical transmission media
2.wireless transmission media


What is Physical transmission media?

Its is wired entities of data passing through it from source to destination.

Physical transmission media are
1.co-axial cable
2.twisted pair cable
3.fiber optical cable.

1.co-axial cable
It has two types
*thinnet fiber optic cable
*thicknet fiber optic cable
Thinnet fiber optic cable also called as 10BASE2.
*here
10 means - 10Mbps
Base - Baseband
2 - 200 metres

@ The segment length of this cable is 200 metres
@ But actual in practical a length is 185 metres.

@ Thinnet usually uesed at where a devices are frequently adding and removing...

2.thicknet Optical fiber

thicknet fiber optic cable
Thicknet fiber optic cable also called as 10BASE5.
*here
10 means - 10Mbps
Base - Baseband
5 - 500 metres

@ The segment length of this cable is 500 metres

@ Thicknet is a backbone cable of internet which is laid down under the sea and connected to all countries to each other.....

2.Fiber optic cable

It is made from glass,this glass is used for transferring data..

It used LED light rays for data transferring..
It has high capacity to carry data..
It more costly and flexible

Fiber optic has two type
@ single mode
@ multi mode

Single mode.
It used single light ray for data transferring
It faster than multi mode

Multi mode.
It used multiple light rays for data transferring at a time....
Data rate will be 10 Gbps

3.twisted pair.

It has eight wired which are pair 2-2
And make 4 pair out of eight wire....
It twisted because it is protect from electro magnetic field.

Segment length 100 metres.

There are two types twisted pair cable
@ shielded twisted pair
@ unshielded twisted pair.

Shielded twisted pair.
It has extra shield to protect it from electro magnetic interface and radio frequency interface..

Its so secure
Less chances of daya loss

Unshielded twisted pair.
It has less secure as compared to shielded twisted pair more chances of data loss
But it is cheapest cable as compare others.

Networking devices.

Hi friends let us talk about networking devices......

What is networking device?

Ans:- A device which form a network is called as networking device. Or
With the help networking devices we can create a network.....

Types of network devices
1.Hub
2.Switch
3.Router
4.NIC CARD
5.Repeater
7.bridge