TLS mutual authentication
===

The below information shows wire shark log for my ssl connection to one of my ldap server. In this client certificate length is zero. Please let me know what is meant by this. Is it because of lack of client  authentication.  For mutual authentication is it mandatory to contain the client certificate.
`
{{{
329	SSLv2	Client Hello
332	TLSv1	Server Hello, Certificate, Certificate Request, Server Hello Done
334	TLSv1	Certificate, Client Key Exchange
336	TLSv1	Change Cipher Spec, Encrypted Handshake Message
337	TLSv1	Change Cipher Spec, Encrypted Handshake Message
}}}`

In frame 332 shows ful certificate information and 334 shows Certificates Length: 0. 
in frame 334 client key Exchange contains enough information to pass the premaster-secret.