A standard SSL certificate is a server certificate that comes with a minimum level of validation. Although it uses the same level of technology to secure the communication, a standard SSL certificate doesn't provide in-depth business verification as OV or EV.

An Extended Validation SSL Certificate (also known as EV SSL for short) is the highest form of SSL Certificate on the market. While all levels of SSL – Extended Validation (EV), Organization Validated (OV), and Domain Validated (DV) – provide encryption and data integrity, they vary in terms of how much identity verification is involved.

A server security audit is a process of reviewing existing policies, procedures, and network architecture. You have to do this to ensure that your server (or servers) are secure from internal or external threats. The server security audit is essential for server admins who are charged with managing server security.

DDoS Attack means "Distributed Denial-of-Service (DDoS) Attack" and it is a cybercrime in which the attacker floods a server with internet traffic to prevent users from accessing connected online services and sites.