What are the modern means of communication?

What are the modern means of communication?

The history of means of communication The diversity of forms and methods of communication in ancient times, man used in his early ways of communication, such as painting on the walls in the caves and others, and over time was able to develop the different languages ​​that now vary widely, and then developed the human means of transmission of information by writing messages 

On the leaves and skin patches and others, and transported by messenger from one person to another in different countries, and also was able to use the pigeon pigeon, which trained and volunteered to serve him, especially in the transfer of messages, and all these methods were long ways to drain time and effort in the transfer process For messages between persons, except for their ineffectiveness in 

emergency situations. After the Renaissance and the development of science in recent centuries, man was able to develop means of communication known to the modern means of communication, which is a miracle of the holidays of this era, and characterized these means with the property of the moment, that the information moves at the time of occurrence between the two points on the globe, 

(1) The stages of development of means of communication These methods began to invent means of communication, such as telephone and radio broadcasting, and then develop it to broadcast The television is used when two people want to talk to each other in separate places without the need to meet. Radio and television broadcasts are used to send and not receive information, but to transmit information, local and international news, and various programs for both entertainment and interest. Communication has not stopped there.

 The concept of e-mail has evolved from traditional slow mail to web-based and computer-based e-mail, a fast and free e-mail. The concept of phone and calls has evolved into video calls that have become more effective after the third and fourth generations of the Internet, which have provided tremendous services from service providers and telecommunications companies.

 And finally developed what is known as smart phones and social media, which was the hair that divided the era of the old communications to start a new era completely different, one of the most prominent features of the abolition of the last border between people of different cultures, languages, religions and ethnicities. 

To a device launched in space and moving around the earth. There are thousands of man-made satellites orbiting Earth; some take Earth's satellite imagery to help meteorologists predict the weather and the course of hurricanes, and take pictures of other celestial bodies, such as the sun, black holes, black matter or Distant galaxies. These images help scientists better understand the solar system and the universe in general. 

It also helps to see large tracts of land simultaneously. This capability means that satellites are able to collect a lot of data faster than the various methods used to gather information on the Earth's surface. [3] The wireless network is connected to a range of electronic devices from Non-wire use by different radio waves for several purposes. Most companies use the wireless network instead of wired networks, especially in remote areas, to reduce the cost of connecting cables. 

Wireless networks use radio waves to connect devices, such as laptops, the Internet, and various applications within the company. When wireless computers connect to wireless access points in public places, the connection to the wireless network is established and the data transfer begins. 

There are four main types of wireless networks: [4] Wireless LAN: consists of two or more devices using the wireless distribution method, and provides connection through the Internet access point. Regional Networks (MAN): Connect several wireless LANs. Wireless Wide Area Network (WAN): It covers large areas, such as neighboring towns and cities. Personal Area Network (PAN):

 Connects devices within a relatively small space. The Internet The Internet is about millions of computers around the world connected together. With the interconnectedness of this huge number of computers, it is possible to send emails between them at very high speed, in addition to the exchange of files and images, fixed or moving and sounds, where any networked device can exchange data and even speak directly to users in the latest computers without attention to geographical locations Devices. 

The ARPA was designed by the US Government in 1969 and was first known as ARPANET, and was originally intended to create a network that would allow computer research users at a university to speak with research computers at other universities. [5] Li-Fi is a shortcut to the term Light Fidelity, a high-speed, light-based optical communication technology as a means of data transmission, invented by Harald Hass, a professor of communications 

engineering at the University of Edinburgh, Scotland. American Time Magazine . Li Fi uses the visible light of the electromagnetic spectrum to transmit information at very high speeds, in contrast to traditional forms of wireless communication, such as Wi-Fi, which uses radio frequencies (RF) to transmit the statement