Why do we need a DNS server?
- Because DNS data is meant to be public, preserving the confidentiality of DNS data. The primary security goals for DNS are data integrity and source authentication, which ar\\\re needed to ensure the authenticity of domain name information and maintain the integrity of domain name information in transit.
What is a domain name?
- The Internet is the world’s largest computing network, with hundreds of million of users. From the perspective of a user, each node or resource on this network is identified by a unique name—the domain name—such as www.nist.gov.
How many top level domain names are there?
- There are more than 250 top-level domains, such as .gov and .com, and several million second-level domains, such as nist.gov and ietf.org. Accordingly, there are many name servers in the DNS infrastructure, which each contain information about a small portion of the domain name space.
What is the DNS hosting environment?
- The DNS hosting environment consists of the following elements: Host platform (operating system [OS], file system, communication stack) DNS software (name server, resolver) DNS data (zone file, configuration file) This section describes threats and recommended protection approaches for these portions of the hosting environment.
To build a website you will need both a domain name and web hosting account. Buying a domain name alone only gives you right to use that particular domain name for a specific period (usually one year). You need web hosting to store your website's files.