THE COMMUNICATION SYSTEM
Hi again, this will be my second post and I would like to go straight to the point. Before going to our topic, we must first define what this is exactly.
Firstly, in communication system, there is a network that is responsible to connect us all together in order to create a system. There is 2 types of network known as the human network. Human network is basically a system that assist us in sharing information and services among individuals or a group of people sharing the same interest towards a certain topic. Human network is generally a social structure comprising the individuals or organisations connected through technology and devices. This can be seen through social network and technology and software combined together to allow these individuals to collaborate and share their interest in any types of interest or even their careers.
A computer network is a network that connects all the computers and other devices for the purpose of sharing information and resources and for computer communication.
These branches of network had actually transform our lifestyle. It's fantastic and brilliant that it create a digital communication. Digital communication is the process in which 2 or more computers or devices can share data, instructions and information.
In digital communication, there are devices and tools that needs to be used in order for a successful communication to be achieved. We will need a sending device, communication device, a transmission media and the receiving device.
What exactly are these devices?
Well, to start off:
1. A sending device is a device that initiates instructions to transmit data, instructions and information.
These branches of network had actually transform our lifestyle. It's fantastic and brilliant that it create a digital communication. Digital communication is the process in which 2 or more computers or devices can share data, instructions and information.
In digital communication, there are devices and tools that needs to be used in order for a successful communication to be achieved. We will need a sending device, communication device, a transmission media and the receiving device.
What exactly are these devices?
Well, to start off:
1. A sending device is a device that initiates instructions to transmit data, instructions and information.
A sending device are like servers, desktops, laptops and smartphones.
2. Communication devices are device that connects a sending device to the transmission media. There are many types of communication device,definitively speaking it will be a connector between these two device.
For what we usually call as modem, these are the DSL modem, Dial-up modem and ISDN modem.
There are others like wireless access point, switch or hub, network cards and routers. Most of which everyone knows.
A dial-up modem functions to convert digital signals into analog signal and vice versa so that the data can travel through analog phone lines.
Of course the difference between these signals are pretty obvious but what exactly is that ?
The difference is obvious in the amplitude of the wave of the signals being sent. The analog signals sends impulses through electrical pulses which are sent throughout the analog phone lines. This is however is a bit different when it comes to the digital signals because it uses the translation of these information into binary format and each bit is represented into 2 distinct amplitude of wave.
A DSL modem is a broadband modem that sends and receives digital data from the computers to the DSL line.
An ISDN modem is a broadband modem that sends and receives digital data over the computer to an ISDN line.
A wireless access point is a central communication device that allows computers and devices to transfer data wirelessly among themselves and even to a wired network.
A router is a device that connects multiple computers or other routers together on a network.
A network cards, they're adapter cards which allows device or the computer that does not have a built-in networking capabilities to access to the network.
Switch or commonly known as a hub, is a communication device that provides a central points for cables to a network.
3. A transmission media is a material use in which the data travels through.
Transmission media uses materials that have the ability of 1 or more signals in a communication channel.
So, there are 2 types of transmission media which are:
2. Communication devices are device that connects a sending device to the transmission media. There are many types of communication device,definitively speaking it will be a connector between these two device.
For what we usually call as modem, these are the DSL modem, Dial-up modem and ISDN modem.
There are others like wireless access point, switch or hub, network cards and routers. Most of which everyone knows.
A dial-up modem functions to convert digital signals into analog signal and vice versa so that the data can travel through analog phone lines.
Of course the difference between these signals are pretty obvious but what exactly is that ?
The difference is obvious in the amplitude of the wave of the signals being sent. The analog signals sends impulses through electrical pulses which are sent throughout the analog phone lines. This is however is a bit different when it comes to the digital signals because it uses the translation of these information into binary format and each bit is represented into 2 distinct amplitude of wave.
A DSL modem is a broadband modem that sends and receives digital data from the computers to the DSL line.
An ISDN modem is a broadband modem that sends and receives digital data over the computer to an ISDN line.
A wireless access point is a central communication device that allows computers and devices to transfer data wirelessly among themselves and even to a wired network.
A router is a device that connects multiple computers or other routers together on a network.
A network cards, they're adapter cards which allows device or the computer that does not have a built-in networking capabilities to access to the network.
Switch or commonly known as a hub, is a communication device that provides a central points for cables to a network.
3. A transmission media is a material use in which the data travels through.
Transmission media uses materials that have the ability of 1 or more signals in a communication channel.
So, there are 2 types of transmission media which are:
- wired
- wireless
The wired medium are well wires that are consisting of 3 types.
- Twisted paired cables.
- 2 wires bundled together
- used for network cabling and phone landlines.
2. Coaxial cables.
- A copper wires surrounded by 3 layers of braided metal and metallic tape.
- CATV ( community access television ) networking usually uses these cables because they can be cabled over long distance.
3. Fiber optics.
- uses glass or fiber strands that uses light to transmit signals.
- Used in a high speed communication.
- Smaller sized cable is used to obtain a faster communication transfer because ( smaller sized cables have bigger surface area and thinner and lighter ).
Next, the wireless medium. this will be the fun part because, well it's the transmission of data through the air or space. There is a few medium that is crucial to be noted as it is what we kept doing everyday.
- Infrared
- Uses light wave
- Mobile computer or other devices usually have an irDA port that enable them to transfer data from a device to another device.
- Broadcast device ( Bluetooth )
- They are short ranged
- Use to connect to the computer or other devices through infrared.
- Cellular radio ( 2G, 3G, 4G )
- A form of broadcast radio that is used widely for mobile communication that are wireless. ( mobile phones and modems.)
- Microwave transmission
- A radio wave that provides a high speed signal transmission over long distance.
- Signals are received through microwave station or satellites.
- Satellites
- Communication satellites is a space station that receives microwave signals from earth and then broadcast it back to earth.
That's all. Thanks for reading. Hope that it is usefull😏
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