Cẩm nang dữ liệu không dây P1

A SHORT HISTORY OF DATA RADIO IN THE BEGINNING In 1899, four years after Marconi’s first wireless telegraph, the British Navy converted to data radio.1 The Czar’s Navy quickly followed. By 1905 the Japanese had mastered the key techniques and began to intercept messages from the Russian Vladivostok fleet cruising secretly south of Tokyo Bay. Japan’s victorious Battle of Tsushima followed. Driven by continued military demands, wireless data technology leaped forward. In 1914 the hapless Russians lost the Battle of Tannenburg because of German intercepts of their land-based data radio communications and in 1917 the British successfully...