vSphere 5.x 환경에 vSphere Client로 접속을 시도하면 다음과 같은 에러 메시지와 함께 접속이 않될 경우가 있습니다.An unknown connection error occurred. (The request failed because the client could not validate the server's SSL certificate. (The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.))” ■ 원인vSphere Client는 .NET Framework 3.5 SP1 이상이 필요하기 때문입니다. ■ 해결방법 여기서 .NET Framework..