How many levels does a wildcard certificate cover?

With the wildcard option, main domain and all subdomains can be covered by one certificate. To accomplish this the asterisk (*) symbol is used place of the “www” in the FQDN. However, you can also have a Wildcard SSL certificate for two levels.

What is second level subdomain?

A Second Level Domain (SLD) is the part of the domain name that is located right before a Top Level Domain (TLD). For example, in mozilla.org the SLD is mozilla and the TLD is org . For example, www is a commonly used subdomain to indicate the domain points to a web server.

Do SSL certificates work for subdomains?

You can secure your main domain and unlimited subdomains on the first level with a single Subdomain SSL Certificate. According to your organization’s need, there are two different types of Wildcard SSL. Both the types are available in DV and OV validation levels.

Are wildcard certificates safe?

In that sense, wildcard certificates are simply less secure and can open the door to phishing attacks. Thus, wildcard certificates can create significant security risks since the same private key is used across multiple systems, thereby increasing the risk of compromise across your organization.

Can a subdomain have a period?

When you see periods in a URL it is referred to as a subdomain. Subdomains are intended to be used to host different content than what is found in the main domain and as an alternative to having to register a bunch of individual domain names.

Can you stack subdomains?

Yes. You can have as many levels as you like in DNS.

What is the difference between a second level domain and a subdomain?

A second-level domain is the label immediately to the left of the top-level domain, separated by a dot. A domain is a subdomain of another domain if it is contained within that domain. A subdomain is the label immediately to the left of a second-level domain.