These. it is demonstrating what the speaker is taking about
If the sentence in question is a statement (ends with a period), I would probably "however" as your transition word.
Answer:
try mixing the first question and last question if that helps but none of these will be perfect because they hold different points
Answer;
Subnetting;
The process of taking a large network and splitting it up into many individual and smaller subnetworks is known as subnetting.
Explanation;
The process is built in to a system of IP addressing, by assigning a series of computers similar IP addresses and assigning the network to appropriate network mask. Therefore, computers on that network can communicate among each other with ease.
Answer:
The main idea is the point of the paragraph. It's usually a sentence, it is usually the the first sentence. But yeah that's all I know. I hope I helped at least ._.