servlet session method with https

[Chad.Davis]

The specification ( servlet 2.4 ) says that the servlet session may be 
implemented via session cookie or, in the case of https, via the ssl mechanism. 
 My server is only accessible via https.  Does tomcat use the ssl mechanism in 
this case?  I do see the JSESSINID cookie, so as far as I can tell, it uses the 
cookie method.