Networks are made up of a mixture of different communication methods. These are mixed between both wireless are wired. I am going to go through the different ways that electronic systems communicate with each other.
A simplex is perhaps the most basic form of electronic communication. It simply means a device that can send a signal, but not receive one, for example a computer keyboard.
This is a type of communication that means that, while both sides can send and receive data, only one side can do so at one time. This makes best use of the bandwidth. They use signalling and synchronisation to control who is transmitting at what point. Half duplex systems are used by most Ethernet systems.
This is when both sides can send and receive data, and can do so simultaneously. More advanced network systems use this, but is only available on devices that are compatible, as it is relatively new and advanced technology.
This is a type of technology that has been created but is quite inefficient. It was the idea that data was shared between 8 parallel lines, like a train track. It was supposed to halve transmission time, but the designs were flawed and the maximum reach was only 3 to 4.5 metres.
USB is arguably one of the most popular forms of data transmission. A USB port on a PC can be wired up to manage and use 128 different devices, so some people choose to install a device similar to an extension lead, turns one USB port into many different ones. USB ports are used to connect all sorts of devices, they can be used for Printers, scanners, cameras, mobile phones and game controllers, as well as many other things. They are also used to transfer electricity, to charge up small devices like mobile phones and cameras.
Infrared was a way of communicating, used to send data from one device to another. Infrared is part of the electromagnetic spectrum, which meant that it was a type of light ray. This meant that the infrared ports between the two devices had to be in direct line of sight in order to transfer which were on the top of side of the device.
Bluetooth is used in most wireless devices; Laptops, Mobile Phones, Tablets and even cars. Bluetooth is a popular form of network communication. It is used on mobile phones to transfer files, and also to make a call while driving without using your hands. Laptops can use it to network with other laptops, tablets and mobile phones. Although if somebody has poor security settings on their Bluetooth device, somebody in their local area can access their device via Bluetooth, and steal data and do some damage, although this is unlikely because the Bluetooth system can really only be used over a distance of 10 metres or less.
Wi-Fi is a type of wireless communication that is used to connect devices in a local area to the internet. Wi-Fi works with no physical wired connection between sender and receiver by using a radio signal. This means that the receiving device doesn’t need to be in direct line of light with the hub. The modern Wi-Fi systems can transmit signals of up to 300 Mbps. This means that the closer that you are to the transceiver, the internet that you are using will be faster.
3G is a system that allows mobile phone customers to access the internet via their mobile network. They can access the internet at speeds of up to 2 Mbps. More recently, some providers have offered up to 7.2 Mbps, which is sufficient to browse text, but can also play music and even videos online.
Coaxial cabling is a relatively outdated form of cabling, it is still used in TV aerials however. It is made up using a copper wire, covered in a plastic lining, then that is laced with very thin copper wires. They are used because they have quite high range, up to 185m before the signal weakens. It can also handle high bandwidth, like a series of different TV channels and it is also very physically flexible. However, can be easily interfered with by external elements. Copper is also an increasingly expensive metal, so that means installing and making these can be quite expensive.
UTP and STP Cables
These are the most popular type used for communications and networks throughout the world. They are made up of an inner cable, and inner sheaf, an outer cable and an outer sheaf, as shown below. UTP comes in a bundle of 8 cables that are paired up that are colour coded to show their matches. Blue, blue with a white line, orange, orange with a white line, brown, brown with a white line, green and green with a white line. The pairs are twisted together, because this cancels out the magnetic interference caused.
Fibre Optic Cables
The fibre optic cables are becoming more and more popular among broadband companies. This is because they can offer fast speeds, and errors are quite rare because electrical interference does not affect it at all. But it cannot be bent sharply and is expensive to make and install. Google Fiber, BT Broadband and Virgin Media offer fibre optic connections, very fast download speeds are able to be transferred through this.