Multicast entries in Mac-address table

I wanted to enable Port-security on my host ports, but on examing the
Mac-address table i found that some of the host ports had multicast entries
learnts on them

What are these muliticast entries for? can I clear them off and enable
port-security with max mac address 1.

Multicast Entries
vlan mac address type ports
-------+---------------+-------+--------------------------------------------
   1 ffff.ffff.ffff system Gi1/1,Gi2/1
  10 ffff.ffff.ffff system Switch,Gi4/3,Gi4/4,Gi4/5,Gi4/6,Gi1/1,Gi2/1
100 ffff.ffff.ffff system Switch,Gi3/2,Gi3/3,Gi3/4,Gi3/5,Gi3/6,Gi3/12
                                Gi3/14,Gi3/15,Gi3/16,Gi3/17,Gi3/18,Gi4/3
                                Gi4/4,Gi4/5,Gi4/6,Gi1/1,Gi2/1
101 ffff.ffff.ffff system Switch,Gi1/1,Gi2/1
102 ffff.ffff.ffff system Switch,Gi4/3,Gi4/4,Gi4/5,Gi4/6,Gi1/1,Gi2/1
103 ffff.ffff.ffff system Gi4/3,Gi4/4,Gi4/5,Gi4/6,Gi1/1,Gi2/1
104 ffff.ffff.ffff system Gi4/3,Gi4/4,Gi4/5,Gi4/6,Gi1/1,Gi2/1
200 ffff.ffff.ffff system Gi3/16,Gi1/1,Gi2/1
301 ffff.ffff.ffff system Switch,Gi1/1,Gi2/1
302 ffff.ffff.ffff system Switch,Gi1/1,Gi2/1
303 ffff.ffff.ffff system Switch,Gi1/1,Gi2/1

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Received on Sun Aug 07 2011 - 14:21:15 ART