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.
An example of a Euryarchaeota is Halobacterium which includes several species of organisms that are found in salt lakes and high saline ocean environments. Korachaeota. This is the name given to the Archaebacteria that do not fall under the Crenarchaeota or Euryarchaeota phyla.ver 250 known species of archaea exist, all of which have been classified into three main phyla (Ramel, n.d.) : 1. Crenarchaeota. 2. Euryarchaeota. 3. Korarchaeota. Crenarchaeota. The members of this phylum are known to be extremophiles.