The technologies involved in communication tend to be complex. You certainly don't need to understand them for your ICT course. However, there are aspects of digital communications that you needs to be aware of. These relate primarily to the two types of network and the ways of connecting to the internet.
Archaeans include inhabitants of some of the most extreme environments on the planet. Some live near rift vents in the deep sea at temperatures well over 100 degrees Centigrade. Others live in hot springs (such as the ones pictured above), or in extremely alkaline or acid waters.
Archaebacteria are organized into three phylums. They are found mainly found in extreme habitats where little else can survive. All Archaebacteria that are known are anerobic and obtain their energy from light. Methanogens: This type of bacteria produces methane.Many such species live in the intestines of animals.They provide essentail nutrients and help breakdown the food in the intestines.The bacteria get a source of energy in return.ethanogens: This type of bacteria produces methane. Many such species live in the intestines of animals. They provide essentail nutrients and help breakdown the food in the intestines. The bacteria get a source of energy in return.