Recommendations for installing OSSIM

It features many software components that aid in the recolection of data, these are used for vulnerability assesments, as IDS, HIDs and others.

What I don't know:

The Physical hardware I need. I was told I would need 3 network cards (NIC). Is this true? please explain. Also I would like to know how much processing power, storage and RAM I will need.

Will the number of Internet service providers (ISPs) be of importance when the hardware selection process take place? We currently have 2 different ISPs for different services.

Will 1 computer with OSSIM be enough to manage security events from about 5 websites of medium traffic and a couple of internal systems? We intend to set up a monitoring station with at least 2 physical monitors to ease the monitoring task.

It features many software components that aid in the recolection of data, these are used for vulnerability assesments, as IDS, HIDs and others.

What I don't know:

The Physical hardware I need. I was told I would need 3 network cards (NIC). Is this true? please explain. Also I would like to know how much processing power, storage and RAM I will need.

Will the number of Internet service providers (ISPs) be of importance when the hardware selection process take place? We currently have 2 different ISPs for different services.

Will 1 computer with OSSIM be enough to manage security events from about 5 websites of medium traffic and a couple of internal systems? We intend to set up a monitoring station with at least 2 physical monitors to ease the monitoring task.