Advice on how to record a remotely accessible video network

[Christian123]

Could anyone describe firstly how a camera network of say four or so cameras would be recorded on location and secondly how a remote recording would work.

So you need:

Camera's (cables, power etc..)
a DVR unit
a Router

Anything else?

1. On Location Recording:

So on location would the DVR unit have a hard drive of some sort where the recording is contained? How is this viewed when on location?

Can this type of recording be accessed remotely and deleted remotely?

2. Remote Recording:

So as far as remote recording is there a means where the recording can be sent directly to an FTP site or some storage space accessible from a remote location.

Thank for any help anyone may be able to offer with this