What does the following command do with respect to the Amazon EC2 security groups?
Removes one or more security groups from a rule.
Removes one or more security groups from an Amazon EC2 instance.
Removes one or more rules from a security group.
Removes a security group from our account.
Removes one or more ingress rules from a security group. The values that you specify in the revoke request
(for example, ports) must match the existing rule’s values for the rule to be removed. http://