Do SSL certificates work with and without www on domain at same time

SSL is nothing but a protocol which provides communication security over internet (network). SSL is responsible to encrypt the segments at Application Layer using asymmetric cryptography for an exchange of key, message authenticity codes for message integrity & symmetric encryption for confidentiality.

SSL is host based & is always installed on a domain, sub domain. SSL is never issued OR installed on an IP address.

In case a CSR is generated for a domain that contains www (www.hostvento.com), it will be relevant to both https://www.hostvento.com and https://hostvento.com domains. Other than the parent domain, this does not have any more subdomains. An alternative is to use a Wild Card SSL certificate if you wish to secure each subdomain.

You can consider any of the  SSL certificates offered by hostvento Hosting. For more details contact us, we are happy to answer all your calls and queries 24/7/365.