I am absolutely new in security. What is TC TrustCenter Class2 CA?

TC TrustCentre is commercial CA (Certifying Authority) operating in Denmark. A commercial Certifying Authority is government approved organisation operating in a perticular country, who has rights to issue Digital Certificates. Digital Certificates are categorised in various classes: highest being Class 3 & lowest Class 1.
Class 3 certificates are mainly personal/individual certificate, web server certificate etc. They are called high trust cerificates. Class 2 are lower trust certificates and are mainly used for VPN/ Network (IPSec complient) devices.

Hope you have got the answer.
Please don't ask what is a digital certificate! ;)