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 a type of prokaryote, that is, a unicellular organism without a cell nucleus.They make up the kingdom Archae, one of the main kingdoms of life. These organisms are difficult to classify because they have similarities to both normal bacteria and the larger eukaryotes.rchaebacteria are unicellular organisms that lack a nucleus. A type of extremophile, archaebacteria use chemical tricks to survive in harsh environments, such as volcanic lakes.