During the initial connection handshaking process all SSL and TLS client sends an ordered cipher suite list to use for the duration of the connection. The server selects a cipher suite from the client's preferred order list of supported cipher suites.
You can configure servers to enforce the use of a specified list of protocols and cipher suites in order of preference. To force the use of a server's protocols and cipher suites list, check the TLS honor server cipher list in the SSL Options or MF Directory Server tabs. You can use this to force the use of a strong, ordered list of protocols and cipher suites. This controls the strength of cryptography used between server and client.