Question: I am a user of hudson. I recently moved to jenkins. I know hudson does not support clustering of servers. Does jenkins provide that. Also elaborate things a little as I am new to this. Thanks in Advance.

Answer: 
OS Jenkins does not support clustering.

Cloudbees Jenkins Enterprise has HA support using active and stand-by Jenkins masters.

<http://jenkins-enterprise.cloudbees.com/docs/user-guide-bundle/ha.html>
Jenkins is fairly close to Hudson, feature-wise. Jenkins project forked off Hudson around 18 months ago and the basic architecture is still the same. So, even without knowing exactly what you mean by clustering, I am confident Jenkins does not support clustering if you say Hudson does not support it.

I have heard rumors there is work going on to make Jenkins have some high-availability features, but that is all I know. No idea what exactly that means or how is it implemented.