Answer :
A wildcard certificate protects the listed domain and all first-level subdomains.
What is subdomain?
A subdomain is a domain that is part of a larger domain. It is an additional part of the main domain name that can be used to identify or organize different sections of a website. Subdomains allow website owners to create distinct sections of their websites that are separate from the main domain.
Therefore, the wildcard certificate for mydomain.com would protect any subdomains such as www.mydomain.com, mail.mydomain.com, and shop.mydomain.com. However, it would not protect any second-level subdomains such as dev.www.mydomain.com. In order to cover this subdomain, you would need to purchase an additional certificate specifically for this subdomain.
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Wildcard certificates cover a domain and its first-level subdomains but not second-level subdomains. For instance, a wildcard certificate for .mydomain.com would not cover dev.www.mydomain.com. ICANN manages the structure and administration of domain names.
Understanding Wildcard Certificates and Domain Coverage
Wildcard certificates are used for securing a domain and all its first-level subdomains. For instance, a wildcard certificate for .mydomain.com would cover domains like www.mydomain.com and mail.mydomain.com, but not second-level subdomains such as dev.www.mydomain.com.
Web addresses, or URLs, start with http:// or https://, where the 's' in https indicates a secure connection. The domain includes the hostname (e.g., www) and is managed by the Internet Corporation for Assigned Names and Numbers (ICANN). The parts following the main domain name, such as .com or .net, are known as top-level domains (TLDs).
ICANN ensures proper administration of domains, keeping track of TLDs, second-level domains, and hostnames. For example, in the domain mail.mydomain.com, 'mail' is the hostname, 'mydomain' is the second-level domain, and '.com' is the TLD.
