The Common Name (CN) is a field within an X.500 distinguished name (DN) that is used to identify an entity, such as an individual, device, or server, within a public key infrastructure (PKI). In the context of PKI, the Common Name is often associated with SSL/TLS certificates, where it represents the domain or entity to which the certificate is issued.
For the Security+ exam, understanding the Common Name is relevant in the context of digital certificates, SSL/TLS, and the establishment of secure communication over the internet.
