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.
Archaea and bacteria have different cell membranes and cell structures, and archaea are found in extreme environments where most bacteria could not survive. Bacteria cell walls contain a substance known as peptidoglycan, while the cell walls of archaea do not.Archaea and bacteria also differ because the cell membranes of archaea have a unique structure and do not contain the same lipids, or fats, that are found in the cell membranes of other organisms.rchaea and bacteria differ in the environments in which they can survive. While bacteria live almost everywhere, only archaea are capable of surviving in harsh extremes, although they are also found elsewhere. Some archaea, known as thermophiles, live in very hot environments such as volcano vents.