[ In this issue ]
From Where and How Are All the Data Coming?
Just 20 years ago, wireless communication devices, such as smart phones, were only for special people. Common people’s communication was through public telephones or wired telephones at homes. However, now we can freely communicate by using wired and wireless devices through not only telephone lines but also the internet connected to the entire world. Then, how have we come to enjoy such real-time communication with people of all over the world, sharing data with them? Let’s follow the journey of data and find out the technologies involved in the journey.