DNS is a process of mapping a human-friendly domain name to an IP address.
DNS Root Servers: A group of servers to answer the root zone. Top Level Domains (TLDs) are controlled by the root zone database – Internet Assigned Numbers Authority (IANA).
Domain Registrars: All domain names must be unique. A registrar is an authority that can assign domain names to top-level domains and ensure its uniqueness. Each domain name becomes registered in a central database (WhoIS server).
Every year in North America, there are a couple of occasions when we can have huge discounts for almost everything. Black Friday sales or Boxing days are well known. One of the chances is the Amazon prime day sales (10/13 – 10/14 in 2020). Even weeks before the event, we were bombarded by the advertisement from Amazon and shopping guides from all types of media.
Subnets are the logic network that you group your resources in a single local network. Communication in and out of a subnet is of critical importance, and a routing table contains the rules on how traffic can be directed.