Free CAS-005 Web TestEngine Demo

Q7 Single choice

The following messages are displayed when a VPN client is attempting to connect to an OpenVPN server:

OpenSSL: error: 140760FC:SSL routines: SSL23_GET_CLIENT_HELLO: unknown protocol' TLS_ERROR:
BIO read tls_read_plaintext error' TLS_ERROR: TLS object->incoming plaintext read error' TLS_ERROR:
TLS handshake failed'
SIGUSR1 [soft, tls_error] received, client_instance restarting'

Which of the following best explains the cause of these messages?

A
The client is attempting to establish an unencrypted connection with the server.
B
The server is unreachable to the client and a connection cannot be established.
C
The client is using LibreSSL libraries while the server is using OpenSSL libraries.
D
A TLS version mismatch exists between the client and the server.

CAS-005 Web TestEngine demo