Johannesburg World Cities Research Network. In 2011, the population of the city of Johannesburg was 4,434,827, making it the most populous city in South Africa. In the same year, the population of Johannesburg's urban agglomeration was put at 7,860,781. The land area of the municipal city () is large in comparison with those of other major cities, resulting in a moderate population density of . The city was established in 1886 following the discovery of gold on what had been a farm. The city is commonly interpreted as the modern day El Dorado due to the extremely large gold deposit found
Internet in Africa overall amount of data traffic at Internet exchange points (IXPs). On African IXPs, traffic can be measured in kbit/s (kilobits per second) or Mbit/s (megabits per second), while in the rest of the world it is typically in the order of magnitude of Gbit/s (gigabits per second). The main IXP of Johannesburg, JINX (which is also the largest IXP in Africa) has about 6.5 Gbit/s traffic (in Sep 2012). IXP traffic, anyway, is only a measure of local network traffic (mainly e-mail), while most of African generated traffic is routed through other continents, and most Web content created in Africa