The way in which information is transmitted in modern times, and what is used to transmit informatio

1、**。**Communication is a communication technology that converts sound energy and electrical energy and uses the medium of "electricity" to transmit language. The simplest form of communication between two users is to connect the two ** machines with a pair of lines.

2. Internet.

The Internet began in 1969 with the ARPANET in the United States. In general, the Internet refers to the Internet in general, while the Internet refers specifically to the Internet. This method of connecting computer networks together can be called "network interconnection", and on this basis, a global Internet network covering the whole world is developed, called the Internet, which is a network structure that is connected to each other.

After the middle of the 19th century, with the invention of the telegraph and the discovery of electromagnetic waves, a fundamental change occurred in the field of human communication, and the electrical impulses on metal wires were realized to transmit information and wireless communication through electromagnetic waves.

In 1837, the American Samuel. Morse successfully developed the world's first electromagnetic telegraph. On May 24, 1844, he gave a public performance of "Delivering a Message by Wire" in the Chamber of the Federal Supreme Court of the Capitol, connecting the telegraph and sending the first telegram in human history with a series of dots and lines of "Morse" code

What a miracle God has wrought! "Long-distance telegraph communication was realized.

In 1864, the British physicist Maxwell established a set of electromagnetic theories, predicting the existence of electromagnetic waves, and showing that electromagnetic waves have the same properties as light, and both travel at the speed of light.

In 1875, the Scottish youth Alexander. Bell invented the world's first ** machine, and in 1878 the first long-distance ** experiment was successfully conducted between Boston and New York, 300 kilometers apart.

Ancient word of mouth or with the help of utensils.

Information is delivered at a slow, imprecise rate.

In ancient times, it was a long journey by post office.

The speed of information transmission is slow and the form of information is single.

Modern times A postal system that relies on means of transportation.

The speed of information transmission is relatively fast, the distance is relatively slow, and the cost is high.

Modern telegraph, **.

Fast speed, single text information.

Contemporary Computer Networks.

The amount of information transmitted is large, the information is diversified, the transmission speed is extremely fast, and it is not subject to geographical barriers.

Beacon, and then the telegraph.

Riding a horse, there is a post station, changing horses does not change people, and running to the death.

Do you understand the paralysis of "modern times"!

Shenma, beacon tower!

From ancient times to the present, our technology has become more and more developed, and the speed of transmitting information has become faster and faster.

Beacon fire, people report, drifting bottles, post delivery.